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Finding the Fourth Proportional to 13.45, 20.03 and 13.27

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Solution

The fourth proportional to 13.45, 20.03 and 13.27 is: 19.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.45 : 20.03 = 13.27 : x
  2. Step 2: Convert to fraction form
    13.45/20.03 = 13.27/x
  3. Step 3: Cross multiply
    13.45x = 20.03 × 13.27
  4. Step 4: Simplify right side
    13.45x = 265.80
  5. Step 5: Solve for x
    x = 265.80/13.45
  6. Step 6: Final answer
    x = 19.76

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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.