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Finding the Fourth Proportional to 17.32, 25.87 and 13.90

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Solution

The fourth proportional to 17.32, 25.87 and 13.90 is: 20.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.32 : 25.87 = 13.90 : x
  2. Step 2: Convert to fraction form
    17.32/25.87 = 13.90/x
  3. Step 3: Cross multiply
    17.32x = 25.87 × 13.90
  4. Step 4: Simplify right side
    17.32x = 359.59
  5. Step 5: Solve for x
    x = 359.59/17.32
  6. Step 6: Final answer
    x = 20.76

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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.