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Finding the Fourth Proportional to 17.72, 24.46 and 11.51

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Solution

The fourth proportional to 17.72, 24.46 and 11.51 is: 15.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.72 : 24.46 = 11.51 : x
  2. Step 2: Convert to fraction form
    17.72/24.46 = 11.51/x
  3. Step 3: Cross multiply
    17.72x = 24.46 × 11.51
  4. Step 4: Simplify right side
    17.72x = 281.38
  5. Step 5: Solve for x
    x = 281.38/17.72
  6. Step 6: Final answer
    x = 15.88

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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.