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Finding the Fourth Proportional to 43,529, 65,294.22 and 18,905

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Solution

The fourth proportional to 43,529, 65,294.22 and 18,905 is: 28,357.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,529 : 65,294.22 = 18,905 : x
  2. Step 2: Convert to fraction form
    43,529/65,294.22 = 18,905/x
  3. Step 3: Cross multiply
    43,529x = 65,294.22 × 18,905
  4. Step 4: Simplify right side
    43,529x = 1,234,387,229.10
  5. Step 5: Solve for x
    x = 1,234,387,229.10/43,529
  6. Step 6: Final answer
    x = 28,357.81

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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.