Home / 20,851.62-31,279.18-6,811.41

Finding the Fourth Proportional to 20,851.62, 31,279.18 and 6,811.41

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Solution

The fourth proportional to 20,851.62, 31,279.18 and 6,811.41 is: 10,217.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.62 : 31,279.18 = 6,811.41 : x
  2. Step 2: Convert to fraction form
    20,851.62/31,279.18 = 6,811.41/x
  3. Step 3: Cross multiply
    20,851.62x = 31,279.18 × 6,811.41
  4. Step 4: Simplify right side
    20,851.62x = 213,055,319.44
  5. Step 5: Solve for x
    x = 213,055,319.44/20,851.62
  6. Step 6: Final answer
    x = 10,217.69

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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.