Question

the ratio of apples to oranges in a fruit basket is 12:4 if there are 7 oranges in the fruit basket then how many apples and oranges are there together?

Answer 1

Just simple proportions:

12(apples)          x(apples)
--------------   =   --------------
4(oranges)        7(oranges)

12*7 = 84
84/4 = 21

There are 21 apples + 7 oranges = 28 apples and oranges!