Home / 6,469.80-9,680.10-3,998.49

Finding the Fourth Proportional to 6,469.80, 9,680.10 and 3,998.49

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Solution

The fourth proportional to 6,469.80, 9,680.10 and 3,998.49 is: 5,982.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,469.80 : 9,680.10 = 3,998.49 : x
  2. Step 2: Convert to fraction form
    6,469.80/9,680.10 = 3,998.49/x
  3. Step 3: Cross multiply
    6,469.80x = 9,680.10 × 3,998.49
  4. Step 4: Simplify right side
    6,469.80x = 38,705,783.05
  5. Step 5: Solve for x
    x = 38,705,783.05/6,469.80
  6. Step 6: Final answer
    x = 5,982.53

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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.