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Finding the Fourth Proportional to 43,469.80, 65,205.18 and 13,887.40

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Solution

The fourth proportional to 43,469.80, 65,205.18 and 13,887.40 is: 20,831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,469.80 : 65,205.18 = 13,887.40 : x
  2. Step 2: Convert to fraction form
    43,469.80/65,205.18 = 13,887.40/x
  3. Step 3: Cross multiply
    43,469.80x = 65,205.18 × 13,887.40
  4. Step 4: Simplify right side
    43,469.80x = 905,530,416.73
  5. Step 5: Solve for x
    x = 905,530,416.73/43,469.80
  6. Step 6: Final answer
    x = 20,831.25

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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.