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Finding the Fourth Proportional to 16.69, 25.02 and 12.62

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Solution

The fourth proportional to 16.69, 25.02 and 12.62 is: 18.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.69 : 25.02 = 12.62 : x
  2. Step 2: Convert to fraction form
    16.69/25.02 = 12.62/x
  3. Step 3: Cross multiply
    16.69x = 25.02 × 12.62
  4. Step 4: Simplify right side
    16.69x = 315.75
  5. Step 5: Solve for x
    x = 315.75/16.69
  6. Step 6: Final answer
    x = 18.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.