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Finding the Fourth Proportional to 13.38, 20.00 and 10.68

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Solution

The fourth proportional to 13.38, 20.00 and 10.68 is: 15.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.38 : 20.00 = 10.68 : x
  2. Step 2: Convert to fraction form
    13.38/20.00 = 10.68/x
  3. Step 3: Cross multiply
    13.38x = 20.00 × 10.68
  4. Step 4: Simplify right side
    13.38x = 213.55
  5. Step 5: Solve for x
    x = 213.55/13.38
  6. Step 6: Final answer
    x = 15.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.