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Finding the Fourth Proportional to 8,615.88, 12,908.49 and 3,607.20

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Solution

The fourth proportional to 8,615.88, 12,908.49 and 3,607.20 is: 5,404.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.88 : 12,908.49 = 3,607.20 : x
  2. Step 2: Convert to fraction form
    8,615.88/12,908.49 = 3,607.20/x
  3. Step 3: Cross multiply
    8,615.88x = 12,908.49 × 3,607.20
  4. Step 4: Simplify right side
    8,615.88x = 46,563,505.13
  5. Step 5: Solve for x
    x = 46,563,505.13/8,615.88
  6. Step 6: Final answer
    x = 5,404.38

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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.