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Finding the Fourth Proportional to 20.03, 29.79 and 19.85

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Solution

The fourth proportional to 20.03, 29.79 and 19.85 is: 29.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.03 : 29.79 = 19.85 : x
  2. Step 2: Convert to fraction form
    20.03/29.79 = 19.85/x
  3. Step 3: Cross multiply
    20.03x = 29.79 × 19.85
  4. Step 4: Simplify right side
    20.03x = 591.33
  5. Step 5: Solve for x
    x = 591.33/20.03
  6. Step 6: Final answer
    x = 29.52

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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.