Home / 8,664.74-12,986.33-3,979.78

Finding the Fourth Proportional to 8,664.74, 12,986.33 and 3,979.78

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Solution

The fourth proportional to 8,664.74, 12,986.33 and 3,979.78 is: 5,964.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,664.74 : 12,986.33 = 3,979.78 : x
  2. Step 2: Convert to fraction form
    8,664.74/12,986.33 = 3,979.78/x
  3. Step 3: Cross multiply
    8,664.74x = 12,986.33 × 3,979.78
  4. Step 4: Simplify right side
    8,664.74x = 51,682,736.41
  5. Step 5: Solve for x
    x = 51,682,736.41/8,664.74
  6. Step 6: Final answer
    x = 5,964.72

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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.