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Finding the Fourth Proportional to 18.47, 25.50 and 12.95

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Solution

The fourth proportional to 18.47, 25.50 and 12.95 is: 17.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.47 : 25.50 = 12.95 : x
  2. Step 2: Convert to fraction form
    18.47/25.50 = 12.95/x
  3. Step 3: Cross multiply
    18.47x = 25.50 × 12.95
  4. Step 4: Simplify right side
    18.47x = 330.24
  5. Step 5: Solve for x
    x = 330.24/18.47
  6. Step 6: Final answer
    x = 17.88

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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.