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Finding the Fourth Proportional to 16.09, 22.21 and 12.22

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Solution

The fourth proportional to 16.09, 22.21 and 12.22 is: 16.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.09 : 22.21 = 12.22 : x
  2. Step 2: Convert to fraction form
    16.09/22.21 = 12.22/x
  3. Step 3: Cross multiply
    16.09x = 22.21 × 12.22
  4. Step 4: Simplify right side
    16.09x = 271.32
  5. Step 5: Solve for x
    x = 271.32/16.09
  6. Step 6: Final answer
    x = 16.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.