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Finding the Fourth Proportional to 16.67, 25.15 and 16.45

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Solution

The fourth proportional to 16.67, 25.15 and 16.45 is: 24.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.67 : 25.15 = 16.45 : x
  2. Step 2: Convert to fraction form
    16.67/25.15 = 16.45/x
  3. Step 3: Cross multiply
    16.67x = 25.15 × 16.45
  4. Step 4: Simplify right side
    16.67x = 413.72
  5. Step 5: Solve for x
    x = 413.72/16.67
  6. Step 6: Final answer
    x = 24.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.