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Finding the Fourth Proportional to 17.98, 24.81 and 11.50

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Solution

The fourth proportional to 17.98, 24.81 and 11.50 is: 15.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.98 : 24.81 = 11.50 : x
  2. Step 2: Convert to fraction form
    17.98/24.81 = 11.50/x
  3. Step 3: Cross multiply
    17.98x = 24.81 × 11.50
  4. Step 4: Simplify right side
    17.98x = 285.26
  5. Step 5: Solve for x
    x = 285.26/17.98
  6. Step 6: Final answer
    x = 15.87

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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.