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Finding the Fourth Proportional to 18.42, 25.41 and 14.55

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Solution

The fourth proportional to 18.42, 25.41 and 14.55 is: 20.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.42 : 25.41 = 14.55 : x
  2. Step 2: Convert to fraction form
    18.42/25.41 = 14.55/x
  3. Step 3: Cross multiply
    18.42x = 25.41 × 14.55
  4. Step 4: Simplify right side
    18.42x = 369.72
  5. Step 5: Solve for x
    x = 369.72/18.42
  6. Step 6: Final answer
    x = 20.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.