Home / 20,850.35-31,288.37-8,197.88

Finding the Fourth Proportional to 20,850.35, 31,288.37 and 8,197.88

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Solution

The fourth proportional to 20,850.35, 31,288.37 and 8,197.88 is: 12,301.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.35 : 31,288.37 = 8,197.88 : x
  2. Step 2: Convert to fraction form
    20,850.35/31,288.37 = 8,197.88/x
  3. Step 3: Cross multiply
    20,850.35x = 31,288.37 × 8,197.88
  4. Step 4: Simplify right side
    20,850.35x = 256,498,277.57
  5. Step 5: Solve for x
    x = 256,498,277.57/20,850.35
  6. Step 6: Final answer
    x = 12,301.87

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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.