If a, b, c, x are in proportion, then a/b = c/x. So, 0.12/0.21 = 8/x => 12/21 = 8/x => 4/7 = 8/x => 4x = 56 => x = 14.
यदि a, b, c, x समानुपात में हैं, तो a/b = c/x। इसलिए, 0.12/0.21 = 8/x => 12/21 = 8/x => 4/7 = 8/x => 4x = 56 => x = 14।