Practical Problems for Proportions

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, cross-multiply the terms and then isolate x.

Front

If 4 apples cost $2, how much do 10 apples cost?

Back

$5

Front

What is the formula for finding the unit rate?

Back

Unit Rate = Total Amount / Number of Units.

Front

If a car travels 300 miles in 5 hours, what is its speed in miles per hour?

Back

60 miles per hour.

Front

How do you set up a proportion to solve a word problem?

Back

Identify the two ratios involved and set them equal to each other.

Front

If 3 pizzas cost $15, how much do 5 pizzas cost?

Back

$25

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.

Front

If 12 pounds of apples cost $24, what is the cost of 1 pound?

Back

$2 per pound.

Front

How do you find the missing value in a proportion?

Back

Cross-multiply and solve for the missing value.