Question

the Windows on a building are proportional to size of the building. the height of each window is 18in and the width is 11 in. if the height of the building is 108ft what is the width of the building

Answer 1

What your doing is setting up a proportion that of the windows(18x11) dimensions and the buildings(108xW) dimensions.
So it would be 18/11=108/x
you would cross multiply so you would have 11x108 (1188)= 18x
Divide by 18 so x=66

Answer 2

66 ft.

Explanation:

It is given that the windows on a building are proportional to size of the building.

Height of each window = 18 in

Width of each window = 11 in

Height of the building = 108 ft

Let the width of the building be x.

Since windows on a building are proportional to size of the building, therefore

`(18)/(11)=(108)/(x)`

On cross multiplication we get

`18* x=108* 11`

Divide both sides by 18.

`x=(108* 11)/(18)`

`x=66`

Therefore, the width of the building is 66 ft.