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Finding the Fourth Proportional to 18.50, 25.55 and 14.88

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Solution

The fourth proportional to 18.50, 25.55 and 14.88 is: 20.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.50 : 25.55 = 14.88 : x
  2. Step 2: Convert to fraction form
    18.50/25.55 = 14.88/x
  3. Step 3: Cross multiply
    18.50x = 25.55 × 14.88
  4. Step 4: Simplify right side
    18.50x = 380.26
  5. Step 5: Solve for x
    x = 380.26/18.50
  6. Step 6: Final answer
    x = 20.56

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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.