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Finding the Fourth Proportional to 16.25, 22.40 and 14.43

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Solution

The fourth proportional to 16.25, 22.40 and 14.43 is: 19.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.25 : 22.40 = 14.43 : x
  2. Step 2: Convert to fraction form
    16.25/22.40 = 14.43/x
  3. Step 3: Cross multiply
    16.25x = 22.40 × 14.43
  4. Step 4: Simplify right side
    16.25x = 323.23
  5. Step 5: Solve for x
    x = 323.23/16.25
  6. Step 6: Final answer
    x = 19.89

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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.