Home / 8,268.90-12,385.53-3,879.78

Finding the Fourth Proportional to 8,268.90, 12,385.53 and 3,879.78

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Solution

The fourth proportional to 8,268.90, 12,385.53 and 3,879.78 is: 5,811.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,268.90 : 12,385.53 = 3,879.78 : x
  2. Step 2: Convert to fraction form
    8,268.90/12,385.53 = 3,879.78/x
  3. Step 3: Cross multiply
    8,268.90x = 12,385.53 × 3,879.78
  4. Step 4: Simplify right side
    8,268.90x = 48,053,131.58
  5. Step 5: Solve for x
    x = 48,053,131.58/8,268.90
  6. Step 6: Final answer
    x = 5,811.31

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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.