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Finding the Fourth Proportional to 13,601.80, 20,399.10 and 4,241.80

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Solution

The fourth proportional to 13,601.80, 20,399.10 and 4,241.80 is: 6,361.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,601.80 : 20,399.10 = 4,241.80 : x
  2. Step 2: Convert to fraction form
    13,601.80/20,399.10 = 4,241.80/x
  3. Step 3: Cross multiply
    13,601.80x = 20,399.10 × 4,241.80
  4. Step 4: Simplify right side
    13,601.80x = 86,528,902.38
  5. Step 5: Solve for x
    x = 86,528,902.38/13,601.80
  6. Step 6: Final answer
    x = 6,361.58

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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.