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Finding the Fourth Proportional to 13,695.40, 20,546.10 and 5,375.40

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Solution

The fourth proportional to 13,695.40, 20,546.10 and 5,375.40 is: 8,064.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.40 : 20,546.10 = 5,375.40 : x
  2. Step 2: Convert to fraction form
    13,695.40/20,546.10 = 5,375.40/x
  3. Step 3: Cross multiply
    13,695.40x = 20,546.10 × 5,375.40
  4. Step 4: Simplify right side
    13,695.40x = 110,443,505.94
  5. Step 5: Solve for x
    x = 110,443,505.94/13,695.40
  6. Step 6: Final answer
    x = 8,064.28

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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.