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Finding the Fourth Proportional to 18.00, 24.85 and 15.95

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Solution

The fourth proportional to 18.00, 24.85 and 15.95 is: 22.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.00 : 24.85 = 15.95 : x
  2. Step 2: Convert to fraction form
    18.00/24.85 = 15.95/x
  3. Step 3: Cross multiply
    18.00x = 24.85 × 15.95
  4. Step 4: Simplify right side
    18.00x = 396.25
  5. Step 5: Solve for x
    x = 396.25/18.00
  6. Step 6: Final answer
    x = 22.01

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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.