Home / 8,121.84-12,189.60-3,194.88

Finding the Fourth Proportional to 8,121.84, 12,189.60 and 3,194.88

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Solution

The fourth proportional to 8,121.84, 12,189.60 and 3,194.88 is: 4,795.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,121.84 : 12,189.60 = 3,194.88 : x
  2. Step 2: Convert to fraction form
    8,121.84/12,189.60 = 3,194.88/x
  3. Step 3: Cross multiply
    8,121.84x = 12,189.60 × 3,194.88
  4. Step 4: Simplify right side
    8,121.84x = 38,944,309.25
  5. Step 5: Solve for x
    x = 38,944,309.25/8,121.84
  6. Step 6: Final answer
    x = 4,795.01

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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.