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Finding the Fourth Proportional to 8,987.17, 13,480.78 and 2,747.15

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Solution

The fourth proportional to 8,987.17, 13,480.78 and 2,747.15 is: 4,120.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.17 : 13,480.78 = 2,747.15 : x
  2. Step 2: Convert to fraction form
    8,987.17/13,480.78 = 2,747.15/x
  3. Step 3: Cross multiply
    8,987.17x = 13,480.78 × 2,747.15
  4. Step 4: Simplify right side
    8,987.17x = 37,033,758.48
  5. Step 5: Solve for x
    x = 37,033,758.48/8,987.17
  6. Step 6: Final answer
    x = 4,120.74

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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.