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Finding the Fourth Proportional to 16.48, 24.73 and 7.81

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Solution

The fourth proportional to 16.48, 24.73 and 7.81 is: 11.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.48 : 24.73 = 7.81 : x
  2. Step 2: Convert to fraction form
    16.48/24.73 = 7.81/x
  3. Step 3: Cross multiply
    16.48x = 24.73 × 7.81
  4. Step 4: Simplify right side
    16.48x = 193.14
  5. Step 5: Solve for x
    x = 193.14/16.48
  6. Step 6: Final answer
    x = 11.72

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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.