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Finding the Fourth Proportional to 20,793.88, 31,191.09 and 6,942.88

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Solution

The fourth proportional to 20,793.88, 31,191.09 and 6,942.88 is: 10,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.88 : 31,191.09 = 6,942.88 : x
  2. Step 2: Convert to fraction form
    20,793.88/31,191.09 = 6,942.88/x
  3. Step 3: Cross multiply
    20,793.88x = 31,191.09 × 6,942.88
  4. Step 4: Simplify right side
    20,793.88x = 216,555,804.27
  5. Step 5: Solve for x
    x = 216,555,804.27/20,793.88
  6. Step 6: Final answer
    x = 10,414.40

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1.5x scale

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.