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Finding the Fourth Proportional to 21,793.75, 32,695.49 and 7,942.75

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Solution

The fourth proportional to 21,793.75, 32,695.49 and 7,942.75 is: 11,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,793.75 : 32,695.49 = 7,942.75 : x
  2. Step 2: Convert to fraction form
    21,793.75/32,695.49 = 7,942.75/x
  3. Step 3: Cross multiply
    21,793.75x = 32,695.49 × 7,942.75
  4. Step 4: Simplify right side
    21,793.75x = 259,692,063.48
  5. Step 5: Solve for x
    x = 259,692,063.48/21,793.75
  6. Step 6: Final answer
    x = 11,915.90

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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.