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Finding the Fourth Proportional to 15,121.92, 22,682.88 and 7,331.88

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Solution

The fourth proportional to 15,121.92, 22,682.88 and 7,331.88 is: 10,997.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.92 : 22,682.88 = 7,331.88 : x
  2. Step 2: Convert to fraction form
    15,121.92/22,682.88 = 7,331.88/x
  3. Step 3: Cross multiply
    15,121.92x = 22,682.88 × 7,331.88
  4. Step 4: Simplify right side
    15,121.92x = 166,308,154.21
  5. Step 5: Solve for x
    x = 166,308,154.21/15,121.92
  6. Step 6: Final answer
    x = 10,997.82

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Similar ratio
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1.5x scale

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.