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Finding the Fourth Proportional to 24.77, 34.20 and 20.67

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Solution

The fourth proportional to 24.77, 34.20 and 20.67 is: 28.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.77 : 34.20 = 20.67 : x
  2. Step 2: Convert to fraction form
    24.77/34.20 = 20.67/x
  3. Step 3: Cross multiply
    24.77x = 34.20 × 20.67
  4. Step 4: Simplify right side
    24.77x = 706.91
  5. Step 5: Solve for x
    x = 706.91/24.77
  6. Step 6: Final answer
    x = 28.54

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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.