Home / 20,701.17-28,553.11-12,747.78

Finding the Fourth Proportional to 20,701.17, 28,553.11 and 12,747.78

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Solution

The fourth proportional to 20,701.17, 28,553.11 and 12,747.78 is: 17,583.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.17 : 28,553.11 = 12,747.78 : x
  2. Step 2: Convert to fraction form
    20,701.17/28,553.11 = 12,747.78/x
  3. Step 3: Cross multiply
    20,701.17x = 28,553.11 × 12,747.78
  4. Step 4: Simplify right side
    20,701.17x = 363,988,732.73
  5. Step 5: Solve for x
    x = 363,988,732.73/20,701.17
  6. Step 6: Final answer
    x = 17,583.00

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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.