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Finding the Fourth Proportional to 27.05, 37.34 and 18.31

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Solution

The fourth proportional to 27.05, 37.34 and 18.31 is: 25.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.05 : 37.34 = 18.31 : x
  2. Step 2: Convert to fraction form
    27.05/37.34 = 18.31/x
  3. Step 3: Cross multiply
    27.05x = 37.34 × 18.31
  4. Step 4: Simplify right side
    27.05x = 683.70
  5. Step 5: Solve for x
    x = 683.70/27.05
  6. Step 6: Final answer
    x = 25.28

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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.