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Finding the Fourth Proportional to 18.42, 27.75 and 14.43

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Solution

The fourth proportional to 18.42, 27.75 and 14.43 is: 21.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.42 : 27.75 = 14.43 : x
  2. Step 2: Convert to fraction form
    18.42/27.75 = 14.43/x
  3. Step 3: Cross multiply
    18.42x = 27.75 × 14.43
  4. Step 4: Simplify right side
    18.42x = 400.43
  5. Step 5: Solve for x
    x = 400.43/18.42
  6. Step 6: Final answer
    x = 21.74

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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.