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Finding the Fourth Proportional to 17.58, 26.22 and 16.91

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Solution

The fourth proportional to 17.58, 26.22 and 16.91 is: 25.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.58 : 26.22 = 16.91 : x
  2. Step 2: Convert to fraction form
    17.58/26.22 = 16.91/x
  3. Step 3: Cross multiply
    17.58x = 26.22 × 16.91
  4. Step 4: Simplify right side
    17.58x = 443.25
  5. Step 5: Solve for x
    x = 443.25/17.58
  6. Step 6: Final answer
    x = 25.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.