# Writing and solving proportions word problems

Choose a main character for your word problem. Now in this example, the unknown is the number of apples, so number of apples to cost, number of apples to cost. Now, you might be wondering, hey, this cross-multiplying doesn't make any intuitive sense.

And then, obviously, you could flip both of these sides. Word problems [Check the type below. And in algebra, all you're saying is that this quantity over here is equal to this quantity over here. So, we get the proportion 2: In one ratio, one of the quantities is not known.

So we have the ratio between the number of apples, 7, and the cost of the apples, 5, is going to be equal to the ratio between another number of apples, which is now x, and the cost of that other number of apples. They're saying 2 cups of flour. So one way to think about it, so we're wondering.

Now let's do this last one. And that answers the question. That's actually the reasoning why cross-multiplication works. Obviously, you can flip both sides of these in either of these equations to get two more equations. I'll use new colors here. For example, "Alexa has 7 purple balloons. Solving proportions Word problems Video transcript A recipe for oatmeal cookies calls for 2 cups of flour for every 3 cups of oatmeal.

And you could flip both sides of this, and it would still be a completely valid ratio. And that comes from straight up algebra. You could say that the ratio of 9 markers to 7 markers is going to be the same as the ratio of their costs, is going to be equal to the ratio of the cost of 9 markers to the cost of 7 markers. And essentially, we're going to be setting up proportions in either case.

For word problem types, check at least one box. From the above information, we can get the following ratio between math problems and minutes. The ratio of 9 markers to the cost of 9 markers is equal to 7 markers to the cost of 7 markers. And what I want to do in this video is not solve the word problems but just set up the equation that we could solve to get the answer to the word problems. So when you use cross-multiplication, you'll say that 2 times 9 must be equal to question mark times 3, must be equal to whatever is in this question mark, the number of cups of flour times 3. You could say 2 cups of flour over 3 cups of oatmeal is equal to question mark.

How do I think when solving this problem?. Sometimes the hardest part of a word problem is figuring out how to turn the words into an equation you can solve. This tutorial let's you see the steps to take in order to turn a word problem involving a blueprint into a proportion.

Solving Proportions. Word problems allow you to see the real world uses of math! This tutorial shows you janettravellmd.com /proportion-word-problem-set-up. The best source for free ratio worksheets. Easier to grade, more in-depth and best of all % FREE! 