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Finding the Fourth Proportional to 16.05, 21.96 and 15.96

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Solution

The fourth proportional to 16.05, 21.96 and 15.96 is: 21.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.05 : 21.96 = 15.96 : x
  2. Step 2: Convert to fraction form
    16.05/21.96 = 15.96/x
  3. Step 3: Cross multiply
    16.05x = 21.96 × 15.96
  4. Step 4: Simplify right side
    16.05x = 350.48
  5. Step 5: Solve for x
    x = 350.48/16.05
  6. Step 6: Final answer
    x = 21.84

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.