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Finding the Fourth Proportional to 43,805.90, 65,672.85 and 18,865.10

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Solution

The fourth proportional to 43,805.90, 65,672.85 and 18,865.10 is: 28,282.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,805.90 : 65,672.85 = 18,865.10 : x
  2. Step 2: Convert to fraction form
    43,805.90/65,672.85 = 18,865.10/x
  3. Step 3: Cross multiply
    43,805.90x = 65,672.85 × 18,865.10
  4. Step 4: Simplify right side
    43,805.90x = 1,238,924,882.54
  5. Step 5: Solve for x
    x = 1,238,924,882.54/43,805.90
  6. Step 6: Final answer
    x = 28,282.15

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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.