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Finding the Fourth Proportional to 29.34, 40.45 and 20.12

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Solution

The fourth proportional to 29.34, 40.45 and 20.12 is: 27.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.34 : 40.45 = 20.12 : x
  2. Step 2: Convert to fraction form
    29.34/40.45 = 20.12/x
  3. Step 3: Cross multiply
    29.34x = 40.45 × 20.12
  4. Step 4: Simplify right side
    29.34x = 813.60
  5. Step 5: Solve for x
    x = 813.60/29.34
  6. Step 6: Final answer
    x = 27.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.