Respuesta :

the answer is x=27. your welcome. :)
6/4 = x/18
cross multiply
(4)(x) = (6)(18)
4x = 108
x = 108/4
x = 27 <==

and notice that 6/4 and 27/18 both reduce to 3/2 because these are equivalent fractions and proportions are nothing but equivalent fractions