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Finding the Fourth Proportional to 8,789.76, 13,177.16 and 3,855.64

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Solution

The fourth proportional to 8,789.76, 13,177.16 and 3,855.64 is: 5,780.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.76 : 13,177.16 = 3,855.64 : x
  2. Step 2: Convert to fraction form
    8,789.76/13,177.16 = 3,855.64/x
  3. Step 3: Cross multiply
    8,789.76x = 13,177.16 × 3,855.64
  4. Step 4: Simplify right side
    8,789.76x = 50,806,385.18
  5. Step 5: Solve for x
    x = 50,806,385.18/8,789.76
  6. Step 6: Final answer
    x = 5,780.18

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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.