Solving Proportions Word Problems

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the two ratios and then solve for the unknown variable.

Front

If 3 meals cost $27, how much does 1 meal cost?

Back

1 meal costs $9.

Front

If 14 sticks of pepperoni are needed for 28 pizzas, how many sticks are needed for 1 pizza?

Back

1 stick of pepperoni is needed for 2 pizzas.

Front

If 50 students were surveyed and 30 like pizza, what fraction of students like pizza?

Back

30/50 or 3/5 of the students like pizza.

Front

If 190 students were surveyed, how many would likely list pizza as a favorite food based on the previous survey?

Back

114 students would likely list pizza as a favorite food.

Front

If a car travels 420 miles in 8 hours, what is its speed in miles per hour?

Back

The speed is 52.5 miles per hour.

Front

How far will the car travel in 12 hours at the same speed?

Back

The car will travel 630 miles in 12 hours.

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc.

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 per 1 unit.