Home / 31,905.26-47,879.79-11,128.76

Finding the Fourth Proportional to 31,905.26, 47,879.79 and 11,128.76

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Solution

The fourth proportional to 31,905.26, 47,879.79 and 11,128.76 is: 16,700.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,905.26 : 47,879.79 = 11,128.76 : x
  2. Step 2: Convert to fraction form
    31,905.26/47,879.79 = 11,128.76/x
  3. Step 3: Cross multiply
    31,905.26x = 47,879.79 × 11,128.76
  4. Step 4: Simplify right side
    31,905.26x = 532,842,691.76
  5. Step 5: Solve for x
    x = 532,842,691.76/31,905.26
  6. Step 6: Final answer
    x = 16,700.78

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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.