Sagot :
Step-by-step explanation:
1. n : 15 = 4 : 12
12n = (15)(4)
12n = 60
n = 60/12
n = 5
2. 18 : 27 = 8 : n
18n = (27)(8)
18n = 216
n = 216/18
n = 12
3. 3 : n = 9 : 36
(3)(36) = 9n
108 = 9n
n = 108/9
n = 12
4. n : 12 = 35 : 32
32n = (12)(35)
32n = 420
n = 420/32