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Finding the Fourth Proportional to 18, 26.96 and 14.63

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Solution

The fourth proportional to 18, 26.96 and 14.63 is: 21.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18 : 26.96 = 14.63 : x
  2. Step 2: Convert to fraction form
    18/26.96 = 14.63/x
  3. Step 3: Cross multiply
    18x = 26.96 × 14.63
  4. Step 4: Simplify right side
    18x = 394.22
  5. Step 5: Solve for x
    x = 394.22/18
  6. Step 6: Final answer
    x = 21.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.