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Finding the Fourth Proportional to 15,892.20, 21,934.11 and 9,176.90

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Solution

The fourth proportional to 15,892.20, 21,934.11 and 9,176.90 is: 12,665.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892.20 : 21,934.11 = 9,176.90 : x
  2. Step 2: Convert to fraction form
    15,892.20/21,934.11 = 9,176.90/x
  3. Step 3: Cross multiply
    15,892.20x = 21,934.11 × 9,176.90
  4. Step 4: Simplify right side
    15,892.20x = 201,287,024.39
  5. Step 5: Solve for x
    x = 201,287,024.39/15,892.20
  6. Step 6: Final answer
    x = 12,665.77

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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.