Answer:
3 : 4 :: 12 : x proportion 3x = 48 product means/extremes Can you solve for x and answer?
(If not look below.)
Explanation:
ratio: 3:4
so divide 12 by 3=4
and multiply 4 by 4=16
your friend sells 16 tickets
ratio is now 12:16
4 : 3 = 12 : x
x = 12 * 4 / 3 = 16