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Finding the Fourth Proportional to 13,992.62, 20,989.14 and 3,604.38

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Solution

The fourth proportional to 13,992.62, 20,989.14 and 3,604.38 is: 5,406.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,992.62 : 20,989.14 = 3,604.38 : x
  2. Step 2: Convert to fraction form
    13,992.62/20,989.14 = 3,604.38/x
  3. Step 3: Cross multiply
    13,992.62x = 20,989.14 × 3,604.38
  4. Step 4: Simplify right side
    13,992.62x = 75,652,836.43
  5. Step 5: Solve for x
    x = 75,652,836.43/13,992.62
  6. Step 6: Final answer
    x = 5,406.62

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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.