Answer :
well, your ratio given is 18 to 4. so multiply both numbers (18 and 4) by some number and you will have an equivalent ratio.
example: if you had 2 times as many people, then an equivalent ratio would be 18*2 to 4*2 = 36 to 8
example: if you had 2 times as many people, then an equivalent ratio would be 18*2 to 4*2 = 36 to 8
