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Finding the Fourth Proportional to 28.25, 39.08 and 24.20

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Solution

The fourth proportional to 28.25, 39.08 and 24.20 is: 33.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.25 : 39.08 = 24.20 : x
  2. Step 2: Convert to fraction form
    28.25/39.08 = 24.20/x
  3. Step 3: Cross multiply
    28.25x = 39.08 × 24.20
  4. Step 4: Simplify right side
    28.25x = 945.75
  5. Step 5: Solve for x
    x = 945.75/28.25
  6. Step 6: Final answer
    x = 33.48

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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.