Proportion Word Problems

Front

What is a proportion?

Back

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

Front

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

Back

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

Front

If 3 out of 5 students like pizza, how many out of 20 students would you expect to like pizza?

Back

12 students (3/5 = x/20, so x = 12).

Front

What is the formula to find the unit rate?

Back

Unit Rate = Total Quantity / Number of Units.

Front

If a car travels 60 miles in 1 hour, how far will it travel in 3 hours?

Back

180 miles (60 miles/hour * 3 hours).

Front

What is the relationship between ratios and proportions?

Back

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

Front

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

Back

$5 (4 apples = $2, so 10 apples = $5).

Front

How do you find the missing value in a proportion?

Back

Cross-multiply and solve for the missing value.

Front

If a recipe requires 2 cups of flour for 4 servings, how much flour is needed for 10 servings?

Back

5 cups of flour (2 cups/4 servings = x/10 servings, so x = 5).

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity of one.