jika perbandingan 3:7 sama dengan 27:k,nilai k+14 adalah

3:7 = 27:k
k = 7 x 27 / 3
k = 63
k + 14 = 77

pakai kali silang

3/7 = 27/k
k = (7 . 27)/3
k = 63

k + 14 = 77