Home / 15,711.56-21,691.92-10,929.72

Finding the Fourth Proportional to 15,711.56, 21,691.92 and 10,929.72

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Solution

The fourth proportional to 15,711.56, 21,691.92 and 10,929.72 is: 15,089.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.56 : 21,691.92 = 10,929.72 : x
  2. Step 2: Convert to fraction form
    15,711.56/21,691.92 = 10,929.72/x
  3. Step 3: Cross multiply
    15,711.56x = 21,691.92 × 10,929.72
  4. Step 4: Simplify right side
    15,711.56x = 237,086,611.86
  5. Step 5: Solve for x
    x = 237,086,611.86/15,711.56
  6. Step 6: Final answer
    x = 15,089.95

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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.