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Finding the Fourth Proportional to 8,989.80, 13,481.28 and 2,747.91

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Solution

The fourth proportional to 8,989.80, 13,481.28 and 2,747.91 is: 4,120.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.80 : 13,481.28 = 2,747.91 : x
  2. Step 2: Convert to fraction form
    8,989.80/13,481.28 = 2,747.91/x
  3. Step 3: Cross multiply
    8,989.80x = 13,481.28 × 2,747.91
  4. Step 4: Simplify right side
    8,989.80x = 37,045,344.12
  5. Step 5: Solve for x
    x = 37,045,344.12/8,989.80
  6. Step 6: Final answer
    x = 4,120.82

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1.5x scale

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.