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Finding the Fourth Proportional to 8,479.13, 12,720.11 and 2,634.57

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Solution

The fourth proportional to 8,479.13, 12,720.11 and 2,634.57 is: 3,952.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.13 : 12,720.11 = 2,634.57 : x
  2. Step 2: Convert to fraction form
    8,479.13/12,720.11 = 2,634.57/x
  3. Step 3: Cross multiply
    8,479.13x = 12,720.11 × 2,634.57
  4. Step 4: Simplify right side
    8,479.13x = 33,512,007.03
  5. Step 5: Solve for x
    x = 33,512,007.03/8,479.13
  6. Step 6: Final answer
    x = 3,952.30

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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.