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Finding the Fourth Proportional to 43,608.57, 65,412.92 and 12,443.82

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Solution

The fourth proportional to 43,608.57, 65,412.92 and 12,443.82 is: 18,665.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,608.57 : 65,412.92 = 12,443.82 : x
  2. Step 2: Convert to fraction form
    43,608.57/65,412.92 = 12,443.82/x
  3. Step 3: Cross multiply
    43,608.57x = 65,412.92 × 12,443.82
  4. Step 4: Simplify right side
    43,608.57x = 813,986,602.15
  5. Step 5: Solve for x
    x = 813,986,602.15/43,608.57
  6. Step 6: Final answer
    x = 18,665.75

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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.