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Finding the Fourth Proportional to 16.00, 21.96 and 13.57

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Solution

The fourth proportional to 16.00, 21.96 and 13.57 is: 18.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.00 : 21.96 = 13.57 : x
  2. Step 2: Convert to fraction form
    16.00/21.96 = 13.57/x
  3. Step 3: Cross multiply
    16.00x = 21.96 × 13.57
  4. Step 4: Simplify right side
    16.00x = 297.94
  5. Step 5: Solve for x
    x = 297.94/16.00
  6. Step 6: Final answer
    x = 18.62

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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.