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Finding the Fourth Proportional to 43,893.72, 65,806.56 and 21,691.80

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Solution

The fourth proportional to 43,893.72, 65,806.56 and 21,691.80 is: 32,520.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,893.72 : 65,806.56 = 21,691.80 : x
  2. Step 2: Convert to fraction form
    43,893.72/65,806.56 = 21,691.80/x
  3. Step 3: Cross multiply
    43,893.72x = 65,806.56 × 21,691.80
  4. Step 4: Simplify right side
    43,893.72x = 1,427,462,738.21
  5. Step 5: Solve for x
    x = 1,427,462,738.21/43,893.72
  6. Step 6: Final answer
    x = 32,520.89

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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.