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Finding the Fourth Proportional to 15,027.28, 20,737.28 and 8,312.76

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Solution

The fourth proportional to 15,027.28, 20,737.28 and 8,312.76 is: 11,471.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,027.28 : 20,737.28 = 8,312.76 : x
  2. Step 2: Convert to fraction form
    15,027.28/20,737.28 = 8,312.76/x
  3. Step 3: Cross multiply
    15,027.28x = 20,737.28 × 8,312.76
  4. Step 4: Simplify right side
    15,027.28x = 172,384,052.47
  5. Step 5: Solve for x
    x = 172,384,052.47/15,027.28
  6. Step 6: Final answer
    x = 11,471.41

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Double scale
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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.