Question

the ratio of elephants to tigers at the local zoo is 1 to 4 There are 16 elephants at the zoo how many tigers are there

Answer 1

1/4 = 16/t.....1 elephant to 4 tigers = 16 elephants to t tigers
cross multiply
(1)(t) = (16)(4)
t = 64 <=== 64 tigers

Answer 2

Ratio:

elephants      1       16
------------- = ---- = -------
  tigers          4          x

Solving this equation of ratios, we get x = 64 (tigers)