Home / 8,078.11-12,108.45-3,909.31

Finding the Fourth Proportional to 8,078.11, 12,108.45 and 3,909.31

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Solution

The fourth proportional to 8,078.11, 12,108.45 and 3,909.31 is: 5,859.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.11 : 12,108.45 = 3,909.31 : x
  2. Step 2: Convert to fraction form
    8,078.11/12,108.45 = 3,909.31/x
  3. Step 3: Cross multiply
    8,078.11x = 12,108.45 × 3,909.31
  4. Step 4: Simplify right side
    8,078.11x = 47,335,684.67
  5. Step 5: Solve for x
    x = 47,335,684.67/8,078.11
  6. Step 6: Final answer
    x = 5,859.75

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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.