For every 3 pears there are 4 apples; therefore 1 pear = 1.33 apple.And in every 5 pears, there are 2 avocados; therefore 1 avocado = 2.5 pears.Since there are 18 avocado trees, the number of pears would be 45 pear trees. And since there are 45 pear trees, there will be 59.85 apple trees, rounding it off to 60 apple trees. So the ratio of avocado trees to apple trees would be 18 to 60 or 18: 60.
Hope this helped☺☺
(I think this is the answer)
