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Finding the Fourth Proportional to 43,480.70, 65,245.67 and 18,518.15

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Solution

The fourth proportional to 43,480.70, 65,245.67 and 18,518.15 is: 27,787.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,480.70 : 65,245.67 = 18,518.15 : x
  2. Step 2: Convert to fraction form
    43,480.70/65,245.67 = 18,518.15/x
  3. Step 3: Cross multiply
    43,480.70x = 65,245.67 × 18,518.15
  4. Step 4: Simplify right side
    43,480.70x = 1,208,229,243.88
  5. Step 5: Solve for x
    x = 1,208,229,243.88/43,480.70
  6. Step 6: Final answer
    x = 27,787.71

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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.