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Finding the Fourth Proportional to 8,674.43, 12,990.67 and 4,965.41

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Solution

The fourth proportional to 8,674.43, 12,990.67 and 4,965.41 is: 7,436.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,674.43 : 12,990.67 = 4,965.41 : x
  2. Step 2: Convert to fraction form
    8,674.43/12,990.67 = 4,965.41/x
  3. Step 3: Cross multiply
    8,674.43x = 12,990.67 × 4,965.41
  4. Step 4: Simplify right side
    8,674.43x = 64,504,022.79
  5. Step 5: Solve for x
    x = 64,504,022.79/8,674.43
  6. Step 6: Final answer
    x = 7,436.12

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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.