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Finding the Fourth Proportional to 8,369.97, 12,555.09 and 3,986.55

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Solution

The fourth proportional to 8,369.97, 12,555.09 and 3,986.55 is: 5,979.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,369.97 : 12,555.09 = 3,986.55 : x
  2. Step 2: Convert to fraction form
    8,369.97/12,555.09 = 3,986.55/x
  3. Step 3: Cross multiply
    8,369.97x = 12,555.09 × 3,986.55
  4. Step 4: Simplify right side
    8,369.97x = 50,051,494.04
  5. Step 5: Solve for x
    x = 50,051,494.04/8,369.97
  6. Step 6: Final answer
    x = 5,979.89

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1.5x scale

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.