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Finding the Fourth Proportional to 22.36, 33.68 and 18.40

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Solution

The fourth proportional to 22.36, 33.68 and 18.40 is: 27.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.36 : 33.68 = 18.40 : x
  2. Step 2: Convert to fraction form
    22.36/33.68 = 18.40/x
  3. Step 3: Cross multiply
    22.36x = 33.68 × 18.40
  4. Step 4: Simplify right side
    22.36x = 619.60
  5. Step 5: Solve for x
    x = 619.60/22.36
  6. Step 6: Final answer
    x = 27.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.