Solve for Proportions using Cross Multiplication

Front

What is a proportion?

Back

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

Front

What is cross multiplication?

Back

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

Front

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

Back

The cross multiplication equation is a * d = b * c.

Front

Solve for x: 2/x = 4/8

Back

x = 4.

Front

Solve for d: 3/d = 1/2

Back

d = 6.

Front

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

Back

The first step is to set up the equation with the two ratios.

Front

If 5/10 = x/20, what is x?

Back

x = 10.

Front

What does it mean if two ratios are equivalent?

Back

It means that they represent the same relationship or proportion.

Front

Solve for b: 6/b = 3/9

Back

b = 18.

Front

What is the relationship between the means and extremes in a proportion?

Back

In a proportion, the product of the means equals the product of the extremes.