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Finding the Fourth Proportional to 12,251.86, 16,906.90 and 7,214.92

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Solution

The fourth proportional to 12,251.86, 16,906.90 and 7,214.92 is: 9,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,251.86 : 16,906.90 = 7,214.92 : x
  2. Step 2: Convert to fraction form
    12,251.86/16,906.90 = 7,214.92/x
  3. Step 3: Cross multiply
    12,251.86x = 16,906.90 × 7,214.92
  4. Step 4: Simplify right side
    12,251.86x = 121,981,930.95
  5. Step 5: Solve for x
    x = 121,981,930.95/12,251.86
  6. Step 6: Final answer
    x = 9,956.20

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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.