Cross Multiplying Review

Front

What is cross multiplying?

Back

Cross multiplying is a method used to solve proportions by multiplying the numerator of one fraction by the denominator of the other fraction.

Front

If a/b = c/d, what is the cross multiplication equation?

Back

The cross multiplication equation is ad = bc.

Front

Solve the proportion: 2/3 = x/9

Back

x = 6.

Front

Solve the proportion: 5/x = 15/3

Back

x = 1.

Front

What does it mean if two ratios are equivalent?

Back

Two ratios are equivalent if their cross products are equal.

Front

Solve the proportion: 4/5 = x/20

Back

x = 16.

Front

If 3/4 = x/12, what is x?

Back

x = 9.

Front

What is the first step in solving a proportion using cross multiplication?

Back

The first step is to set the two ratios equal to each other.

Front

Solve: 7/x = 14/2

Back

x = 1.

Front

If a proportion is set up as 8/12 = x/18, what is x?

Back

x = 12.