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Finding the Fourth Proportional to 20.29, 30.29 and 17.23

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Solution

The fourth proportional to 20.29, 30.29 and 17.23 is: 25.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.29 : 30.29 = 17.23 : x
  2. Step 2: Convert to fraction form
    20.29/30.29 = 17.23/x
  3. Step 3: Cross multiply
    20.29x = 30.29 × 17.23
  4. Step 4: Simplify right side
    20.29x = 521.90
  5. Step 5: Solve for x
    x = 521.90/20.29
  6. Step 6: Final answer
    x = 25.72

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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.