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Finding the Fourth Proportional to 22,105.80, 30,508.92 and 12,672.54

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Solution

The fourth proportional to 22,105.80, 30,508.92 and 12,672.54 is: 17,489.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,105.80 : 30,508.92 = 12,672.54 : x
  2. Step 2: Convert to fraction form
    22,105.80/30,508.92 = 12,672.54/x
  3. Step 3: Cross multiply
    22,105.80x = 30,508.92 × 12,672.54
  4. Step 4: Simplify right side
    22,105.80x = 386,625,509.06
  5. Step 5: Solve for x
    x = 386,625,509.06/22,105.80
  6. Step 6: Final answer
    x = 17,489.78

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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.