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Finding the Fourth Proportional to 16.93, 25.22 and 15.78

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Solution

The fourth proportional to 16.93, 25.22 and 15.78 is: 23.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.93 : 25.22 = 15.78 : x
  2. Step 2: Convert to fraction form
    16.93/25.22 = 15.78/x
  3. Step 3: Cross multiply
    16.93x = 25.22 × 15.78
  4. Step 4: Simplify right side
    16.93x = 397.97
  5. Step 5: Solve for x
    x = 397.97/16.93
  6. Step 6: Final answer
    x = 23.51

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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.