Home / 8,268.40-12,384.78-3,879.28

Finding the Fourth Proportional to 8,268.40, 12,384.78 and 3,879.28

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Solution

The fourth proportional to 8,268.40, 12,384.78 and 3,879.28 is: 5,810.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,268.40 : 12,384.78 = 3,879.28 : x
  2. Step 2: Convert to fraction form
    8,268.40/12,384.78 = 3,879.28/x
  3. Step 3: Cross multiply
    8,268.40x = 12,384.78 × 3,879.28
  4. Step 4: Simplify right side
    8,268.40x = 48,044,029.36
  5. Step 5: Solve for x
    x = 48,044,029.36/8,268.40
  6. Step 6: Final answer
    x = 5,810.56

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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.