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Finding the Fourth Proportional to 18.03, 27 and 12.30

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Solution

The fourth proportional to 18.03, 27 and 12.30 is: 18.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.03 : 27 = 12.30 : x
  2. Step 2: Convert to fraction form
    18.03/27 = 12.30/x
  3. Step 3: Cross multiply
    18.03x = 27 × 12.30
  4. Step 4: Simplify right side
    18.03x = 332.10
  5. Step 5: Solve for x
    x = 332.10/18.03
  6. Step 6: Final answer
    x = 18.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.