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Finding the Fourth Proportional to 13,698.72, 20,544.84 and 5,375.88

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Solution

The fourth proportional to 13,698.72, 20,544.84 and 5,375.88 is: 8,062.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.72 : 20,544.84 = 5,375.88 : x
  2. Step 2: Convert to fraction form
    13,698.72/20,544.84 = 5,375.88/x
  3. Step 3: Cross multiply
    13,698.72x = 20,544.84 × 5,375.88
  4. Step 4: Simplify right side
    13,698.72x = 110,446,594.46
  5. Step 5: Solve for x
    x = 110,446,594.46/13,698.72
  6. Step 6: Final answer
    x = 8,062.55

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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.