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Finding the Fourth Proportional to 43,909.72, 65,864.63 and 20,552.56

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Solution

The fourth proportional to 43,909.72, 65,864.63 and 20,552.56 is: 30,828.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,909.72 : 65,864.63 = 20,552.56 : x
  2. Step 2: Convert to fraction form
    43,909.72/65,864.63 = 20,552.56/x
  3. Step 3: Cross multiply
    43,909.72x = 65,864.63 × 20,552.56
  4. Step 4: Simplify right side
    43,909.72x = 1,353,686,759.95
  5. Step 5: Solve for x
    x = 1,353,686,759.95/43,909.72
  6. Step 6: Final answer
    x = 30,828.86

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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.