Răspuns:
Explicație pas cu pas:
a/1/4 = b/1/16 = c/1/27 = k
a= k/4 => a = 3
b=k/16 => b = 12/ 16 = 3/4
c=k/27 => c = 16/27
a x b x c = 1
k/4 x k/16 x k/27 = 1
k^3 = 1728 => k = 12
