Proportion Word Problems

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the unknown variable.

Front

What is the formula for finding the missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

If 12 ounces of shampoo lasts 16 weeks, how long will 18 ounces last?

Back

24 weeks.

Front

How do you find the total number of items in a population using a sample?

Back

Use the ratio of the sample to the total population to estimate the total number of items.

Front

If 42 elephants were trapped and 35 were female, what is the ratio of female elephants in the sample?

Back

The ratio is 35 female elephants to 42 total elephants, or 35:42.

Front

What is the relationship between cups of sugar and cups of flour in baking cookies if the ratio is 1:5?

Back

For every 1 cup of sugar, 5 cups of flour are needed.

Front

If Myesha uses 25 cups of flour, how much sugar is needed?

Back

5 cups of sugar.

Front

In Ms. King's class, if 40 out of 56 students enjoy baseball, what is the proportion of students who enjoy baseball?

Back

The proportion is 40/56 or 5/7.