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Finding the Fourth Proportional to 18.26, 25.31 and 17.89

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Solution

The fourth proportional to 18.26, 25.31 and 17.89 is: 24.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.26 : 25.31 = 17.89 : x
  2. Step 2: Convert to fraction form
    18.26/25.31 = 17.89/x
  3. Step 3: Cross multiply
    18.26x = 25.31 × 17.89
  4. Step 4: Simplify right side
    18.26x = 452.78
  5. Step 5: Solve for x
    x = 452.78/18.26
  6. Step 6: Final answer
    x = 24.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.