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Finding the Fourth Proportional to 11,908.21, 17,865.79 and 5,332.86

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Solution

The fourth proportional to 11,908.21, 17,865.79 and 5,332.86 is: 8,000.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,908.21 : 17,865.79 = 5,332.86 : x
  2. Step 2: Convert to fraction form
    11,908.21/17,865.79 = 5,332.86/x
  3. Step 3: Cross multiply
    11,908.21x = 17,865.79 × 5,332.86
  4. Step 4: Simplify right side
    11,908.21x = 95,275,756.86
  5. Step 5: Solve for x
    x = 95,275,756.86/11,908.21
  6. Step 6: Final answer
    x = 8,000.85

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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.