Solving Proportions

Front

What is a proportion?

Back

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

Front

How do you set up a proportion?

Back

To set up a proportion, you can use the formula a/b = c/d, where a and b are the first ratio, and c and d are the second ratio.

Front

What does it mean to solve a proportion?

Back

Solving a proportion means finding the unknown value that makes the two ratios equal.

Front

If the ratio of dogs to cats is 5 to 3 and there are 25 dogs, how many cats are there?

Back

15 cats.

Front

If 13 out of 20 homes have a personal computer, how many computers would you expect in 60 homes?

Back

39 Computers.

Front

If a car travels 280 miles in 7 hours, how far will it travel in 12 hours?

Back

480 miles.

Front

If Mrs. Setzer ran 6 miles in 57 minutes, how many miles did she run in 19 minutes?

Back

2 miles.

Front

What is the cost of one slice of pizza if a pizza with 8 slices costs $12?

Back

$1.50.

Front

What is the cross-multiplication method for solving proportions?

Back

Cross-multiplication involves multiplying the numerator of one ratio by the denominator of the other ratio and setting the two products equal.

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.