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Finding the Fourth Proportional to 12,251.61, 18,383.49 and 4,855.91

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Solution

The fourth proportional to 12,251.61, 18,383.49 and 4,855.91 is: 7,286.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,251.61 : 18,383.49 = 4,855.91 : x
  2. Step 2: Convert to fraction form
    12,251.61/18,383.49 = 4,855.91/x
  3. Step 3: Cross multiply
    12,251.61x = 18,383.49 × 4,855.91
  4. Step 4: Simplify right side
    12,251.61x = 89,268,481.01
  5. Step 5: Solve for x
    x = 89,268,481.01/12,251.61
  6. Step 6: Final answer
    x = 7,286.27

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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.