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Finding the Fourth Proportional to 13,797.72, 20,697.26 and 3,938.45

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Solution

The fourth proportional to 13,797.72, 20,697.26 and 3,938.45 is: 5,907.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,797.72 : 20,697.26 = 3,938.45 : x
  2. Step 2: Convert to fraction form
    13,797.72/20,697.26 = 3,938.45/x
  3. Step 3: Cross multiply
    13,797.72x = 20,697.26 × 3,938.45
  4. Step 4: Simplify right side
    13,797.72x = 81,515,123.65
  5. Step 5: Solve for x
    x = 81,515,123.65/13,797.72
  6. Step 6: Final answer
    x = 5,907.87

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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.