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Finding the Fourth Proportional to 13,963.79, 20,945.79 and 4,103.21

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Solution

The fourth proportional to 13,963.79, 20,945.79 and 4,103.21 is: 6,154.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,963.79 : 20,945.79 = 4,103.21 : x
  2. Step 2: Convert to fraction form
    13,963.79/20,945.79 = 4,103.21/x
  3. Step 3: Cross multiply
    13,963.79x = 20,945.79 × 4,103.21
  4. Step 4: Simplify right side
    13,963.79x = 85,945,027.35
  5. Step 5: Solve for x
    x = 85,945,027.35/13,963.79
  6. Step 6: Final answer
    x = 6,154.85

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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.