Home / 20,918.66-31,375.68-6,127.72

Finding the Fourth Proportional to 20,918.66, 31,375.68 and 6,127.72

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Solution

The fourth proportional to 20,918.66, 31,375.68 and 6,127.72 is: 9,190.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.66 : 31,375.68 = 6,127.72 : x
  2. Step 2: Convert to fraction form
    20,918.66/31,375.68 = 6,127.72/x
  3. Step 3: Cross multiply
    20,918.66x = 31,375.68 × 6,127.72
  4. Step 4: Simplify right side
    20,918.66x = 192,261,381.85
  5. Step 5: Solve for x
    x = 192,261,381.85/20,918.66
  6. Step 6: Final answer
    x = 9,190.90

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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.