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Finding the Fourth Proportional to 17.92, 26.92 and 14.40

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Solution

The fourth proportional to 17.92, 26.92 and 14.40 is: 21.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.92 : 26.92 = 14.40 : x
  2. Step 2: Convert to fraction form
    17.92/26.92 = 14.40/x
  3. Step 3: Cross multiply
    17.92x = 26.92 × 14.40
  4. Step 4: Simplify right side
    17.92x = 387.65
  5. Step 5: Solve for x
    x = 387.65/17.92
  6. Step 6: Final answer
    x = 21.63

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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.