find the number that makes the ratio equivalent to 25:4. \\boxed{}:12

$find the number that makes the ratio equivalent to 25:4. \\boxed{}:12$

find the number that makes the ratio equivalent to 25:4. \boxed{}:12

The second term of the ratio changes from 4 to 12. We find the multiplier by dividing 12 by 4: $12\div4 = 3$.

To find the missing number, we multiply the first term of the original ratio (25) by the multiplier (3): $25\times3 = 75$.

75