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Finding the Fourth Proportional to 20.63, 28.28 and 20.41

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Solution

The fourth proportional to 20.63, 28.28 and 20.41 is: 27.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.63 : 28.28 = 20.41 : x
  2. Step 2: Convert to fraction form
    20.63/28.28 = 20.41/x
  3. Step 3: Cross multiply
    20.63x = 28.28 × 20.41
  4. Step 4: Simplify right side
    20.63x = 577.18
  5. Step 5: Solve for x
    x = 577.18/20.63
  6. Step 6: Final answer
    x = 27.97

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.