Home / 21,086.97-31,639.20-9,234.62

Finding the Fourth Proportional to 21,086.97, 31,639.20 and 9,234.62

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Solution

The fourth proportional to 21,086.97, 31,639.20 and 9,234.62 is: 13,855.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.97 : 31,639.20 = 9,234.62 : x
  2. Step 2: Convert to fraction form
    21,086.97/31,639.20 = 9,234.62/x
  3. Step 3: Cross multiply
    21,086.97x = 31,639.20 × 9,234.62
  4. Step 4: Simplify right side
    21,086.97x = 292,175,966.87
  5. Step 5: Solve for x
    x = 292,175,966.87/21,086.97
  6. Step 6: Final answer
    x = 13,855.76

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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.