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Finding the Fourth Proportional to 21,902.91, 32,893.97 and 20,144.76

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Solution

The fourth proportional to 21,902.91, 32,893.97 and 20,144.76 is: 30,253.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.91 : 32,893.97 = 20,144.76 : x
  2. Step 2: Convert to fraction form
    21,902.91/32,893.97 = 20,144.76/x
  3. Step 3: Cross multiply
    21,902.91x = 32,893.97 × 20,144.76
  4. Step 4: Simplify right side
    21,902.91x = 662,641,131.10
  5. Step 5: Solve for x
    x = 662,641,131.10/21,902.91
  6. Step 6: Final answer
    x = 30,253.57

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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.