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Finding the Fourth Proportional to 18.96, 28.37 and 11.23

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Solution

The fourth proportional to 18.96, 28.37 and 11.23 is: 16.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.96 : 28.37 = 11.23 : x
  2. Step 2: Convert to fraction form
    18.96/28.37 = 11.23/x
  3. Step 3: Cross multiply
    18.96x = 28.37 × 11.23
  4. Step 4: Simplify right side
    18.96x = 318.45
  5. Step 5: Solve for x
    x = 318.45/18.96
  6. Step 6: Final answer
    x = 16.80

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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.