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Finding the Fourth Proportional to 15,753.88, 21,730.42 and 9,375.71

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Solution

The fourth proportional to 15,753.88, 21,730.42 and 9,375.71 is: 12,932.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,753.88 : 21,730.42 = 9,375.71 : x
  2. Step 2: Convert to fraction form
    15,753.88/21,730.42 = 9,375.71/x
  3. Step 3: Cross multiply
    15,753.88x = 21,730.42 × 9,375.71
  4. Step 4: Simplify right side
    15,753.88x = 203,738,011.17
  5. Step 5: Solve for x
    x = 203,738,011.17/15,753.88
  6. Step 6: Final answer
    x = 12,932.56

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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.