I am trying to help someone figure out a ratio table problem for their 6th grade homework.

They are easy when the numbers go into one another, or the factor is simple to identify and solve for X:

 160    [      ]    80
4000   [      ]    X

160    [  2   ]    80
4000   [ 2000 ]    50

But I can't figure this one out (they do not use decimals in their work for this or I would just divide):

50     [      ]    18
60     [      ]    X

What can 50 be divide or multiplied by that can then be divided or multiplied to get 18?

The answer is 2.6, but that can't be right because they do not use decimals. I can't see how it can be done otherwise.