Solve the proportion 4 : x = 5 : 16

Question

 Please i need help wit ?

Answer 1

4 : x = 5 : 16

5x = 4(16)       product means/extremes

5x = 64

x = 64/5

Answer 2

Emily, I suggest you set the problem up as fractions. Proportions and fractions are just complementary ways of expressing the same underlying idea, namely the size relationship between two quantities:

 

4/x = 5/16

Now you can do whatever you need to do, to solve for "x". One quick way to get results is to invert each side:

x/4 = 16/5

then solve for x :

x = 4*16/5

x = 12 + 4/5

Note that if you needed to (such as if there were "x"s here and there throughout the proportion) you could do the "full metal jacket" approach: x * 5 = 4 * 16 , then solve that (for the same answer).

Answer 3

4/x = 5/16

5x = 64

x = 64/5 = 12 4/5