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Finding the Fourth Proportional to 22.09, 30.43 and 15.17

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Solution

The fourth proportional to 22.09, 30.43 and 15.17 is: 20.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.09 : 30.43 = 15.17 : x
  2. Step 2: Convert to fraction form
    22.09/30.43 = 15.17/x
  3. Step 3: Cross multiply
    22.09x = 30.43 × 15.17
  4. Step 4: Simplify right side
    22.09x = 461.62
  5. Step 5: Solve for x
    x = 461.62/22.09
  6. Step 6: Final answer
    x = 20.90

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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.