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Finding the Fourth Proportional to 20.03, 27.61 and 18.68

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Solution

The fourth proportional to 20.03, 27.61 and 18.68 is: 25.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20.03 : 27.61 = 18.68 : x
  2. Step 2: Convert to fraction form
    20.03/27.61 = 18.68/x
  3. Step 3: Cross multiply
    20.03x = 27.61 × 18.68
  4. Step 4: Simplify right side
    20.03x = 515.57
  5. Step 5: Solve for x
    x = 515.57/20.03
  6. Step 6: Final answer
    x = 25.75

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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.