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Finding the Fourth Proportional to 8,781.11, 13,162.78 and 3,157.11

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Solution

The fourth proportional to 8,781.11, 13,162.78 and 3,157.11 is: 4,732.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.11 : 13,162.78 = 3,157.11 : x
  2. Step 2: Convert to fraction form
    8,781.11/13,162.78 = 3,157.11/x
  3. Step 3: Cross multiply
    8,781.11x = 13,162.78 × 3,157.11
  4. Step 4: Simplify right side
    8,781.11x = 41,556,336.47
  5. Step 5: Solve for x
    x = 41,556,336.47/8,781.11
  6. Step 6: Final answer
    x = 4,732.47

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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.