Solve Proportional Relationships

Front

What is a proportion?

Back

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

Front

How do you solve for x in a proportion?

Back

To solve for x in a proportion, you can use cross-multiplication.

Front

What are cross products in a proportion?

Back

Cross products are the products of the means and the extremes in a proportion, and they are always equal.

Front

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

Back

The cross product is ad = bc.

Front

What does it mean if two ratios are proportional?

Back

It means that the two ratios express the same relationship between quantities.

Front

Solve for x: 2/3 = x/6

Back

x = 4.

Front

Solve for x: 5/x = 15/9

Back

x = 3.

Front

What is the first step in solving a proportion?

Back

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

Front

If 3/4 = x/16, what is x?

Back

x = 12.

Front

What is the relationship between equivalent fractions and proportions?

Back

Equivalent fractions represent the same value and can be used to form proportions.