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Finding the Fourth Proportional to 12,237.90, 18,351.45 and 4,839.90

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Solution

The fourth proportional to 12,237.90, 18,351.45 and 4,839.90 is: 7,257.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,237.90 : 18,351.45 = 4,839.90 : x
  2. Step 2: Convert to fraction form
    12,237.90/18,351.45 = 4,839.90/x
  3. Step 3: Cross multiply
    12,237.90x = 18,351.45 × 4,839.90
  4. Step 4: Simplify right side
    12,237.90x = 88,819,182.86
  5. Step 5: Solve for x
    x = 88,819,182.86/12,237.90
  6. Step 6: Final answer
    x = 7,257.71

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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.