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Finding the Fourth Proportional to 18.04, 27.16 and 13.25

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Solution

The fourth proportional to 18.04, 27.16 and 13.25 is: 19.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.04 : 27.16 = 13.25 : x
  2. Step 2: Convert to fraction form
    18.04/27.16 = 13.25/x
  3. Step 3: Cross multiply
    18.04x = 27.16 × 13.25
  4. Step 4: Simplify right side
    18.04x = 359.90
  5. Step 5: Solve for x
    x = 359.90/18.04
  6. Step 6: Final answer
    x = 19.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.