Finding the Fourth Proportional to 15,781,136.92, 21,777,753.90 and 8,811,922.12
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Solution
The fourth proportional to 15,781,136.92, 21,777,753.90 and 8,811,922.12 is: 12,160,332.45
Step by Step Solution
- Step 1: Write the proportion equation
15,781,136.92 : 21,777,753.90 = 8,811,922.12 : x - Step 2: Convert to fraction form
15,781,136.92/21,777,753.90 = 8,811,922.12/x - Step 3: Cross multiply
15,781,136.92x = 21,777,753.90 × 8,811,922.12 - Step 4: Simplify right side
15,781,136.92x = 191,903,871,315,326.25 - Step 5: Solve for x
x = 191,903,871,315,326.25/15,781,136.92 - Step 6: Final answer
x = 12,160,332.45
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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.