Home / 20,846.86-31,276.13-8,375.64

Finding the Fourth Proportional to 20,846.86, 31,276.13 and 8,375.64

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Solution

The fourth proportional to 20,846.86, 31,276.13 and 8,375.64 is: 12,565.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.86 : 31,276.13 = 8,375.64 : x
  2. Step 2: Convert to fraction form
    20,846.86/31,276.13 = 8,375.64/x
  3. Step 3: Cross multiply
    20,846.86x = 31,276.13 × 8,375.64
  4. Step 4: Simplify right side
    20,846.86x = 261,957,481.64
  5. Step 5: Solve for x
    x = 261,957,481.64/20,846.86
  6. Step 6: Final answer
    x = 12,565.80

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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.