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Finding the Fourth Proportional to 43,408.63, 65,113.08 and 12,243.88

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Solution

The fourth proportional to 43,408.63, 65,113.08 and 12,243.88 is: 18,365.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,408.63 : 65,113.08 = 12,243.88 : x
  2. Step 2: Convert to fraction form
    43,408.63/65,113.08 = 12,243.88/x
  3. Step 3: Cross multiply
    43,408.63x = 65,113.08 × 12,243.88
  4. Step 4: Simplify right side
    43,408.63x = 797,236,737.95
  5. Step 5: Solve for x
    x = 797,236,737.95/43,408.63
  6. Step 6: Final answer
    x = 18,365.86

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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.