Home / 8,321.72-12,475.26-3,126.38

Finding the Fourth Proportional to 8,321.72, 12,475.26 and 3,126.38

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Solution

The fourth proportional to 8,321.72, 12,475.26 and 3,126.38 is: 4,686.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321.72 : 12,475.26 = 3,126.38 : x
  2. Step 2: Convert to fraction form
    8,321.72/12,475.26 = 3,126.38/x
  3. Step 3: Cross multiply
    8,321.72x = 12,475.26 × 3,126.38
  4. Step 4: Simplify right side
    8,321.72x = 39,002,340.98
  5. Step 5: Solve for x
    x = 39,002,340.98/8,321.72
  6. Step 6: Final answer
    x = 4,686.82

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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.