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Finding the Fourth Proportional to 15,171.92, 20,930.48 and 8,881.52

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Solution

The fourth proportional to 15,171.92, 20,930.48 and 8,881.52 is: 12,252.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,171.92 : 20,930.48 = 8,881.52 : x
  2. Step 2: Convert to fraction form
    15,171.92/20,930.48 = 8,881.52/x
  3. Step 3: Cross multiply
    15,171.92x = 20,930.48 × 8,881.52
  4. Step 4: Simplify right side
    15,171.92x = 185,894,476.73
  5. Step 5: Solve for x
    x = 185,894,476.73/15,171.92
  6. Step 6: Final answer
    x = 12,252.53

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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.