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Finding the Fourth Proportional to 19.89, 27.44 and 18.08

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Solution

The fourth proportional to 19.89, 27.44 and 18.08 is: 24.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.89 : 27.44 = 18.08 : x
  2. Step 2: Convert to fraction form
    19.89/27.44 = 18.08/x
  3. Step 3: Cross multiply
    19.89x = 27.44 × 18.08
  4. Step 4: Simplify right side
    19.89x = 495.89
  5. Step 5: Solve for x
    x = 495.89/19.89
  6. Step 6: Final answer
    x = 24.93

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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.