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Finding the Fourth Proportional to 46.35, 69.48 and 20.66

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Solution

The fourth proportional to 46.35, 69.48 and 20.66 is: 30.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.35 : 69.48 = 20.66 : x
  2. Step 2: Convert to fraction form
    46.35/69.48 = 20.66/x
  3. Step 3: Cross multiply
    46.35x = 69.48 × 20.66
  4. Step 4: Simplify right side
    46.35x = 1,435.11
  5. Step 5: Solve for x
    x = 1,435.11/46.35
  6. Step 6: Final answer
    x = 30.96

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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.