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Finding the Fourth Proportional to 8,676.92, 13,012.72 and 3,129.57

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Solution

The fourth proportional to 8,676.92, 13,012.72 and 3,129.57 is: 4,693.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,676.92 : 13,012.72 = 3,129.57 : x
  2. Step 2: Convert to fraction form
    8,676.92/13,012.72 = 3,129.57/x
  3. Step 3: Cross multiply
    8,676.92x = 13,012.72 × 3,129.57
  4. Step 4: Simplify right side
    8,676.92x = 40,724,210.31
  5. Step 5: Solve for x
    x = 40,724,210.31/8,676.92
  6. Step 6: Final answer
    x = 4,693.39

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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.