Finding the Fourth Proportional to 28,247,739.88, 38,979,728.47 and 15,855,438.81
Calculator
Solution
The fourth proportional to 28,247,739.88, 38,979,728.47 and 15,855,438.81 is: 21,879,297.32
Step by Step Solution
- Step 1: Write the proportion equation
28,247,739.88 : 38,979,728.47 = 15,855,438.81 : x - Step 2: Convert to fraction form
28,247,739.88/38,979,728.47 = 15,855,438.81/x - Step 3: Cross multiply
28,247,739.88x = 38,979,728.47 × 15,855,438.81 - Step 4: Simplify right side
28,247,739.88x = 618,040,699,544,378.62 - Step 5: Solve for x
x = 618,040,699,544,378.62/28,247,739.88 - Step 6: Final answer
x = 21,879,297.32
Related Problems
Find fourth proportional to 14,123,869.94, 19,489,864.24 and 7,927,719.40
Half scale
Find fourth proportional to 56,495,479.76, 77,959,456.94 and 31,710,877.62
Double scale
Find fourth proportional to 28,247,740.88, 38,979,729.85 and 15,855,439.81
Similar ratio
Find fourth proportional to 42,371,609.82, 58,469,592.71 and 23,783,158.21
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.