Solve Proportions

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 variable.

Front

What is the cross-multiplication method?

Back

The cross-multiplication method involves multiplying the numerator of one ratio by the denominator of the other ratio.

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

What is the simplest form of a ratio?

Back

The simplest form of a ratio is when the numbers are reduced to their smallest whole number values.

Front

If a class has 12 girls and 16 boys, what is the ratio of girls to boys?

Back

The ratio of girls to boys is 12:16, which simplifies to 3:4.

Front

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

Back

Front

If Ernesto can make 2 flags in 3 hours, how long will it take him to make 5 flags?

Back

It will take him 7.5 hours to make 5 flags.

Front

What does it mean to solve for x in an equation?

Back

To solve for x means to find the value of x that makes the equation true.

Front

Back

The value of x is 16.