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Finding the Fourth Proportional to 18.90, 25.94 and 16.94

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Solution

The fourth proportional to 18.90, 25.94 and 16.94 is: 23.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.90 : 25.94 = 16.94 : x
  2. Step 2: Convert to fraction form
    18.90/25.94 = 16.94/x
  3. Step 3: Cross multiply
    18.90x = 25.94 × 16.94
  4. Step 4: Simplify right side
    18.90x = 439.42
  5. Step 5: Solve for x
    x = 439.42/18.90
  6. Step 6: Final answer
    x = 23.25

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.