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Finding the Fourth Proportional to 27.26, 40.86 and 18.22

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Solution

The fourth proportional to 27.26, 40.86 and 18.22 is: 27.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.26 : 40.86 = 18.22 : x
  2. Step 2: Convert to fraction form
    27.26/40.86 = 18.22/x
  3. Step 3: Cross multiply
    27.26x = 40.86 × 18.22
  4. Step 4: Simplify right side
    27.26x = 744.47
  5. Step 5: Solve for x
    x = 744.47/27.26
  6. Step 6: Final answer
    x = 27.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.