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Finding the Fourth Proportional to 63.44, 95.16 and 20.69

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Solution

The fourth proportional to 63.44, 95.16 and 20.69 is: 31.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.44 : 95.16 = 20.69 : x
  2. Step 2: Convert to fraction form
    63.44/95.16 = 20.69/x
  3. Step 3: Cross multiply
    63.44x = 95.16 × 20.69
  4. Step 4: Simplify right side
    63.44x = 1,968.86
  5. Step 5: Solve for x
    x = 1,968.86/63.44
  6. Step 6: Final answer
    x = 31.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.