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Finding the Fourth Proportional to 8,867.69, 13,306.19 and 3,940.86

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Solution

The fourth proportional to 8,867.69, 13,306.19 and 3,940.86 is: 5,913.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,867.69 : 13,306.19 = 3,940.86 : x
  2. Step 2: Convert to fraction form
    8,867.69/13,306.19 = 3,940.86/x
  3. Step 3: Cross multiply
    8,867.69x = 13,306.19 × 3,940.86
  4. Step 4: Simplify right side
    8,867.69x = 52,437,812.22
  5. Step 5: Solve for x
    x = 52,437,812.22/8,867.69
  6. Step 6: Final answer
    x = 5,913.36

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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.