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Finding the Fourth Proportional to 8,711.69, 13,063.43 and 3,161.15

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Solution

The fourth proportional to 8,711.69, 13,063.43 and 3,161.15 is: 4,740.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.69 : 13,063.43 = 3,161.15 : x
  2. Step 2: Convert to fraction form
    8,711.69/13,063.43 = 3,161.15/x
  3. Step 3: Cross multiply
    8,711.69x = 13,063.43 × 3,161.15
  4. Step 4: Simplify right side
    8,711.69x = 41,295,380.62
  5. Step 5: Solve for x
    x = 41,295,380.62/8,711.69
  6. Step 6: Final answer
    x = 4,740.23

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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.