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Finding the Fourth Proportional to 23.02, 34.34 and 20.74

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Solution

The fourth proportional to 23.02, 34.34 and 20.74 is: 30.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.02 : 34.34 = 20.74 : x
  2. Step 2: Convert to fraction form
    23.02/34.34 = 20.74/x
  3. Step 3: Cross multiply
    23.02x = 34.34 × 20.74
  4. Step 4: Simplify right side
    23.02x = 712.21
  5. Step 5: Solve for x
    x = 712.21/23.02
  6. Step 6: Final answer
    x = 30.94

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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.