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Finding the Fourth Proportional to 12,251.16, 18,379.17 and 3,486.42

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Solution

The fourth proportional to 12,251.16, 18,379.17 and 3,486.42 is: 5,230.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,251.16 : 18,379.17 = 3,486.42 : x
  2. Step 2: Convert to fraction form
    12,251.16/18,379.17 = 3,486.42/x
  3. Step 3: Cross multiply
    12,251.16x = 18,379.17 × 3,486.42
  4. Step 4: Simplify right side
    12,251.16x = 64,077,505.87
  5. Step 5: Solve for x
    x = 64,077,505.87/12,251.16
  6. Step 6: Final answer
    x = 5,230.32

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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.