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Finding the Fourth Proportional to 17.74, 26.51 and 15.67

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Solution

The fourth proportional to 17.74, 26.51 and 15.67 is: 23.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.74 : 26.51 = 15.67 : x
  2. Step 2: Convert to fraction form
    17.74/26.51 = 15.67/x
  3. Step 3: Cross multiply
    17.74x = 26.51 × 15.67
  4. Step 4: Simplify right side
    17.74x = 415.41
  5. Step 5: Solve for x
    x = 415.41/17.74
  6. Step 6: Final answer
    x = 23.42

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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.