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Finding the Fourth Proportional to 16.81, 22.89 and 16.68

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Solution

The fourth proportional to 16.81, 22.89 and 16.68 is: 22.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.81 : 22.89 = 16.68 : x
  2. Step 2: Convert to fraction form
    16.81/22.89 = 16.68/x
  3. Step 3: Cross multiply
    16.81x = 22.89 × 16.68
  4. Step 4: Simplify right side
    16.81x = 381.81
  5. Step 5: Solve for x
    x = 381.81/16.81
  6. Step 6: Final answer
    x = 22.71

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.