Jack’s brother Joey is learning about shadows in school. Joey measures Jack’s shadow and finds that it is 4 feet long. Joey looks over at a 56-foothigh building next to the 2 of them and wonders how long the shadow of the building is. Assuming

Jack is 5 feet tall, how long is the shadow of the building?

4/5 = x/56

To find x, multiply both sides by 56, then divide by 5.