Question

In a photograph, Ezra is 9cm tall and her brother Keith is 10 cm tall. Ezra's actual height is 153 cm. What is keith's height?

Answer 1

Keith Height is 170cm.

Answer 2

how?

Answer 3

Think about similar triangles in which corresponding sides are proportional.
you have the height which represents the height of the ezra in the picture and the base which represents the actual height of Ezra in actual life. In the other triangle you have the height of keith in the picture and x as Keith's actual height in life. So you would want to set up a ratio and cross multiply then divid in order to find out x.

Answer 4

Then Divid by Ezra's Picture height in order to find out X.