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Finding the Fourth Proportional to 13,603.72, 20,404.14 and 4,369

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Solution

The fourth proportional to 13,603.72, 20,404.14 and 4,369 is: 6,553.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603.72 : 20,404.14 = 4,369 : x
  2. Step 2: Convert to fraction form
    13,603.72/20,404.14 = 4,369/x
  3. Step 3: Cross multiply
    13,603.72x = 20,404.14 × 4,369
  4. Step 4: Simplify right side
    13,603.72x = 89,145,687.66
  5. Step 5: Solve for x
    x = 89,145,687.66/13,603.72
  6. Step 6: Final answer
    x = 6,553.04

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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.