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Finding the Fourth Proportional to 8,778.21, 13,167.68 and 2,934.87

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Solution

The fourth proportional to 8,778.21, 13,167.68 and 2,934.87 is: 4,402.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.21 : 13,167.68 = 2,934.87 : x
  2. Step 2: Convert to fraction form
    8,778.21/13,167.68 = 2,934.87/x
  3. Step 3: Cross multiply
    8,778.21x = 13,167.68 × 2,934.87
  4. Step 4: Simplify right side
    8,778.21x = 38,645,429.00
  5. Step 5: Solve for x
    x = 38,645,429.00/8,778.21
  6. Step 6: Final answer
    x = 4,402.43

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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.