Home / 8,091.80-12,135.30-3,158.60

Finding the Fourth Proportional to 8,091.80, 12,135.30 and 3,158.60

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Solution

The fourth proportional to 8,091.80, 12,135.30 and 3,158.60 is: 4,736.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,091.80 : 12,135.30 = 3,158.60 : x
  2. Step 2: Convert to fraction form
    8,091.80/12,135.30 = 3,158.60/x
  3. Step 3: Cross multiply
    8,091.80x = 12,135.30 × 3,158.60
  4. Step 4: Simplify right side
    8,091.80x = 38,330,558.58
  5. Step 5: Solve for x
    x = 38,330,558.58/8,091.80
  6. Step 6: Final answer
    x = 4,736.96

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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.