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Finding the Fourth Proportional to 16.98, 23.31 and 16.20

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Solution

The fourth proportional to 16.98, 23.31 and 16.20 is: 22.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.98 : 23.31 = 16.20 : x
  2. Step 2: Convert to fraction form
    16.98/23.31 = 16.20/x
  3. Step 3: Cross multiply
    16.98x = 23.31 × 16.20
  4. Step 4: Simplify right side
    16.98x = 377.62
  5. Step 5: Solve for x
    x = 377.62/16.98
  6. Step 6: Final answer
    x = 22.24

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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.