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Finding the Fourth Proportional to 18.19, 27.12 and 17.43

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Solution

The fourth proportional to 18.19, 27.12 and 17.43 is: 25.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.19 : 27.12 = 17.43 : x
  2. Step 2: Convert to fraction form
    18.19/27.12 = 17.43/x
  3. Step 3: Cross multiply
    18.19x = 27.12 × 17.43
  4. Step 4: Simplify right side
    18.19x = 472.67
  5. Step 5: Solve for x
    x = 472.67/18.19
  6. Step 6: Final answer
    x = 25.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.