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Finding the Fourth Proportional to 31,751.26, 47,623.25 and 8,379.52

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Solution

The fourth proportional to 31,751.26, 47,623.25 and 8,379.52 is: 12,568.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,751.26 : 47,623.25 = 8,379.52 : x
  2. Step 2: Convert to fraction form
    31,751.26/47,623.25 = 8,379.52/x
  3. Step 3: Cross multiply
    31,751.26x = 47,623.25 × 8,379.52
  4. Step 4: Simplify right side
    31,751.26x = 399,059,933.94
  5. Step 5: Solve for x
    x = 399,059,933.94/31,751.26
  6. Step 6: Final answer
    x = 12,568.32

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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.