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Finding the Fourth Proportional to 17.21, 23.74 and 13.12

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Solution

The fourth proportional to 17.21, 23.74 and 13.12 is: 18.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.21 : 23.74 = 13.12 : x
  2. Step 2: Convert to fraction form
    17.21/23.74 = 13.12/x
  3. Step 3: Cross multiply
    17.21x = 23.74 × 13.12
  4. Step 4: Simplify right side
    17.21x = 311.47
  5. Step 5: Solve for x
    x = 311.47/17.21
  6. Step 6: Final answer
    x = 18.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.