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Finding the Fourth Proportional to 23.91, 33.03 and 20.28

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Solution

The fourth proportional to 23.91, 33.03 and 20.28 is: 28.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.91 : 33.03 = 20.28 : x
  2. Step 2: Convert to fraction form
    23.91/33.03 = 20.28/x
  3. Step 3: Cross multiply
    23.91x = 33.03 × 20.28
  4. Step 4: Simplify right side
    23.91x = 669.85
  5. Step 5: Solve for x
    x = 669.85/23.91
  6. Step 6: Final answer
    x = 28.02

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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.