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Finding the Fourth Proportional to 10,600.74, 15,906.78 and 8,139.96

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Solution

The fourth proportional to 10,600.74, 15,906.78 and 8,139.96 is: 12,214.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,600.74 : 15,906.78 = 8,139.96 : x
  2. Step 2: Convert to fraction form
    10,600.74/15,906.78 = 8,139.96/x
  3. Step 3: Cross multiply
    10,600.74x = 15,906.78 × 8,139.96
  4. Step 4: Simplify right side
    10,600.74x = 129,480,552.93
  5. Step 5: Solve for x
    x = 129,480,552.93/10,600.74
  6. Step 6: Final answer
    x = 12,214.29

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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.