1) 3/4 = b/12b = 12 * 3/4b = 36/4b = 9
2) b/5 = 6/15b = 5 * 6/15b = 30/15b = 2
3) 2/9 = 8/bb = 9 * 8/2b = 72/2b = 36
4) 10/b = 30/33b = 10 * 33/30b = 330/30b = 11
Итак, при b = 9, 2, 36 и 11 пропорции будут равны.
1) 3/4 = b/12
b = 12 * 3/4
b = 36/4
b = 9
2) b/5 = 6/15
b = 5 * 6/15
b = 30/15
b = 2
3) 2/9 = 8/b
b = 9 * 8/2
b = 72/2
b = 36
4) 10/b = 30/33
b = 10 * 33/30
b = 330/30
b = 11
Итак, при b = 9, 2, 36 и 11 пропорции будут равны.