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Finding the Fourth Proportional to 13,672.62, 18,867.99 and 7,704.90

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Solution

The fourth proportional to 13,672.62, 18,867.99 and 7,704.90 is: 10,632.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.62 : 18,867.99 = 7,704.90 : x
  2. Step 2: Convert to fraction form
    13,672.62/18,867.99 = 7,704.90/x
  3. Step 3: Cross multiply
    13,672.62x = 18,867.99 × 7,704.90
  4. Step 4: Simplify right side
    13,672.62x = 145,375,976.15
  5. Step 5: Solve for x
    x = 145,375,976.15/13,672.62
  6. Step 6: Final answer
    x = 10,632.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.