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Finding the Fourth Proportional to 15,099.92, 20,838.12 and 8,385.98

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Solution

The fourth proportional to 15,099.92, 20,838.12 and 8,385.98 is: 11,572.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,099.92 : 20,838.12 = 8,385.98 : x
  2. Step 2: Convert to fraction form
    15,099.92/20,838.12 = 8,385.98/x
  3. Step 3: Cross multiply
    15,099.92x = 20,838.12 × 8,385.98
  4. Step 4: Simplify right side
    15,099.92x = 174,748,057.56
  5. Step 5: Solve for x
    x = 174,748,057.56/15,099.92
  6. Step 6: Final answer
    x = 11,572.78

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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.