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Finding the Fourth Proportional to 12,472, 18,708 and 5,081.44

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Solution

The fourth proportional to 12,472, 18,708 and 5,081.44 is: 7,622.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,472 : 18,708 = 5,081.44 : x
  2. Step 2: Convert to fraction form
    12,472/18,708 = 5,081.44/x
  3. Step 3: Cross multiply
    12,472x = 18,708 × 5,081.44
  4. Step 4: Simplify right side
    12,472x = 95,063,579.52
  5. Step 5: Solve for x
    x = 95,063,579.52/12,472
  6. Step 6: Final answer
    x = 7,622.16

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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.