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Finding the Fourth Proportional to 44.64, 66.94 and 18.61

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Solution

The fourth proportional to 44.64, 66.94 and 18.61 is: 27.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.64 : 66.94 = 18.61 : x
  2. Step 2: Convert to fraction form
    44.64/66.94 = 18.61/x
  3. Step 3: Cross multiply
    44.64x = 66.94 × 18.61
  4. Step 4: Simplify right side
    44.64x = 1,245.33
  5. Step 5: Solve for x
    x = 1,245.33/44.64
  6. Step 6: Final answer
    x = 27.90

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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.