Question

Amir wants to scale up a photo to create a poster for his room.

The original picture is 6 inches in width and 4 inches in height.

What will be the height of the poster if its width is 30 inches?



24 inches


28 inches


20 inches


18 inches

Answer 1

Since the scaled up photo/poster has to be proportional to the original, we can come up with the equation:

`(4)/(6) =(x)/(30)`

Now we can solve for x, which is the height of the scaled up poster. We cross multiply the fractions to get 6x=120. Then, we divide 6 on both sides to get x=20.

So, the height of the scaled up photo/poster must be 20 inches.

Hope this helps! Have a great day!