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Finding the Fourth Proportional to 28,711.31, 39,624.06 and 15,966.98

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Solution

The fourth proportional to 28,711.31, 39,624.06 and 15,966.98 is: 22,035.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,711.31 : 39,624.06 = 15,966.98 : x
  2. Step 2: Convert to fraction form
    28,711.31/39,624.06 = 15,966.98/x
  3. Step 3: Cross multiply
    28,711.31x = 39,624.06 × 15,966.98
  4. Step 4: Simplify right side
    28,711.31x = 632,676,375.42
  5. Step 5: Solve for x
    x = 632,676,375.42/28,711.31
  6. Step 6: Final answer
    x = 22,035.79

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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.