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Finding the Fourth Proportional to 8,605.28, 12,897.15 and 3,669.15

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Solution

The fourth proportional to 8,605.28, 12,897.15 and 3,669.15 is: 5,499.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,605.28 : 12,897.15 = 3,669.15 : x
  2. Step 2: Convert to fraction form
    8,605.28/12,897.15 = 3,669.15/x
  3. Step 3: Cross multiply
    8,605.28x = 12,897.15 × 3,669.15
  4. Step 4: Simplify right side
    8,605.28x = 47,321,550.30
  5. Step 5: Solve for x
    x = 47,321,550.30/8,605.28
  6. Step 6: Final answer
    x = 5,499.13

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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.