Finding the Fourth Proportional to 20,776,725.20, 31,165,087.80 and 8,642,155.70
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Solution
The fourth proportional to 20,776,725.20, 31,165,087.80 and 8,642,155.70 is: 12,963,233.55
Step by Step Solution
- Step 1: Write the proportion equation
20,776,725.20 : 31,165,087.80 = 8,642,155.70 : x - Step 2: Convert to fraction form
20,776,725.20/31,165,087.80 = 8,642,155.70/x - Step 3: Cross multiply
20,776,725.20x = 31,165,087.80 × 8,642,155.70 - Step 4: Simplify right side
20,776,725.20x = 269,333,541,171,770.44 - Step 5: Solve for x
x = 269,333,541,171,770.44/20,776,725.20 - Step 6: Final answer
x = 12,963,233.55
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.