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Finding the Fourth Proportional to 18,650.75, 27,987.11 and 8,262.59

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Solution

The fourth proportional to 18,650.75, 27,987.11 and 8,262.59 is: 12,398.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,650.75 : 27,987.11 = 8,262.59 : x
  2. Step 2: Convert to fraction form
    18,650.75/27,987.11 = 8,262.59/x
  3. Step 3: Cross multiply
    18,650.75x = 27,987.11 × 8,262.59
  4. Step 4: Simplify right side
    18,650.75x = 231,245,973.90
  5. Step 5: Solve for x
    x = 231,245,973.90/18,650.75
  6. Step 6: Final answer
    x = 12,398.75

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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.