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Finding the Fourth Proportional to 12,611.17, 18,917.85 and 3,251.11

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Solution

The fourth proportional to 12,611.17, 18,917.85 and 3,251.11 is: 4,876.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.17 : 18,917.85 = 3,251.11 : x
  2. Step 2: Convert to fraction form
    12,611.17/18,917.85 = 3,251.11/x
  3. Step 3: Cross multiply
    12,611.17x = 18,917.85 × 3,251.11
  4. Step 4: Simplify right side
    12,611.17x = 61,504,049.46
  5. Step 5: Solve for x
    x = 61,504,049.46/12,611.17
  6. Step 6: Final answer
    x = 4,876.95

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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.