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Finding the Fourth Proportional to 15.33, 21.28 and 14.97

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Solution

The fourth proportional to 15.33, 21.28 and 14.97 is: 20.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.33 : 21.28 = 14.97 : x
  2. Step 2: Convert to fraction form
    15.33/21.28 = 14.97/x
  3. Step 3: Cross multiply
    15.33x = 21.28 × 14.97
  4. Step 4: Simplify right side
    15.33x = 318.56
  5. Step 5: Solve for x
    x = 318.56/15.33
  6. Step 6: Final answer
    x = 20.78

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.