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Finding the Fourth Proportional to 20.26, 30.25 and 18.10

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Solution

The fourth proportional to 20.26, 30.25 and 18.10 is: 27.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.26 : 30.25 = 18.10 : x
  2. Step 2: Convert to fraction form
    20.26/30.25 = 18.10/x
  3. Step 3: Cross multiply
    20.26x = 30.25 × 18.10
  4. Step 4: Simplify right side
    20.26x = 547.53
  5. Step 5: Solve for x
    x = 547.53/20.26
  6. Step 6: Final answer
    x = 27.02

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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.