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Finding the Fourth Proportional to 18,319.62, 27,481.17 and 4,992.78

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Solution

The fourth proportional to 18,319.62, 27,481.17 and 4,992.78 is: 7,489.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,319.62 : 27,481.17 = 4,992.78 : x
  2. Step 2: Convert to fraction form
    18,319.62/27,481.17 = 4,992.78/x
  3. Step 3: Cross multiply
    18,319.62x = 27,481.17 × 4,992.78
  4. Step 4: Simplify right side
    18,319.62x = 137,207,435.95
  5. Step 5: Solve for x
    x = 137,207,435.95/18,319.62
  6. Step 6: Final answer
    x = 7,489.64

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1.5x scale

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.