Determine if 2.5/10=? 12/48 or 2.5/2=? 12/24 is a proportion....
To determine if these are proportions, we need to cross multiply and see if the two products are equal:
For 2.5/10 = 12/48:
2.5 * 48 = 120
10 * 12 = 120
120 = 120
Since the products are equal, 2.5/10 and 12/48 are in proportion.
For 2.5/2 = 12/24:
2.5 * 24 = 60
2 * 12 = 24
60 ≠ 24
Since the products are not equal, 2.5/2 and 12/24 are not in proportion.