Home / 20,862.27-31,277.70-6,813.90

Finding the Fourth Proportional to 20,862.27, 31,277.70 and 6,813.90

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Solution

The fourth proportional to 20,862.27, 31,277.70 and 6,813.90 is: 10,215.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.27 : 31,277.70 = 6,813.90 : x
  2. Step 2: Convert to fraction form
    20,862.27/31,277.70 = 6,813.90/x
  3. Step 3: Cross multiply
    20,862.27x = 31,277.70 × 6,813.90
  4. Step 4: Simplify right side
    20,862.27x = 213,123,120.03
  5. Step 5: Solve for x
    x = 213,123,120.03/20,862.27
  6. Step 6: Final answer
    x = 10,215.72

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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.