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Finding the Fourth Proportional to 13,542.40, 20,297.40 and 6,965.20

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Solution

The fourth proportional to 13,542.40, 20,297.40 and 6,965.20 is: 10,439.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,542.40 : 20,297.40 = 6,965.20 : x
  2. Step 2: Convert to fraction form
    13,542.40/20,297.40 = 6,965.20/x
  3. Step 3: Cross multiply
    13,542.40x = 20,297.40 × 6,965.20
  4. Step 4: Simplify right side
    13,542.40x = 141,375,450.48
  5. Step 5: Solve for x
    x = 141,375,450.48/13,542.40
  6. Step 6: Final answer
    x = 10,439.47

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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.