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Finding the Fourth Proportional to 8,676.52, 13,011.50 and 3,128.49

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Solution

The fourth proportional to 8,676.52, 13,011.50 and 3,128.49 is: 4,691.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,676.52 : 13,011.50 = 3,128.49 : x
  2. Step 2: Convert to fraction form
    8,676.52/13,011.50 = 3,128.49/x
  3. Step 3: Cross multiply
    8,676.52x = 13,011.50 × 3,128.49
  4. Step 4: Simplify right side
    8,676.52x = 40,706,355.46
  5. Step 5: Solve for x
    x = 40,706,355.46/8,676.52
  6. Step 6: Final answer
    x = 4,691.55

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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.