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Finding the Fourth Proportional to 15,127.75, 20,877.96 and 8,668

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Solution

The fourth proportional to 15,127.75, 20,877.96 and 8,668 is: 11,962.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,127.75 : 20,877.96 = 8,668 : x
  2. Step 2: Convert to fraction form
    15,127.75/20,877.96 = 8,668/x
  3. Step 3: Cross multiply
    15,127.75x = 20,877.96 × 8,668
  4. Step 4: Simplify right side
    15,127.75x = 180,970,157.28
  5. Step 5: Solve for x
    x = 180,970,157.28/15,127.75
  6. Step 6: Final answer
    x = 11,962.79

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