Home / 3,878.44-5,808.37-2,120.80

Finding the Fourth Proportional to 3,878.44, 5,808.37 and 2,120.80

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Solution

The fourth proportional to 3,878.44, 5,808.37 and 2,120.80 is: 3,176.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.44 : 5,808.37 = 2,120.80 : x
  2. Step 2: Convert to fraction form
    3,878.44/5,808.37 = 2,120.80/x
  3. Step 3: Cross multiply
    3,878.44x = 5,808.37 × 2,120.80
  4. Step 4: Simplify right side
    3,878.44x = 12,318,380.49
  5. Step 5: Solve for x
    x = 12,318,380.49/3,878.44
  6. Step 6: Final answer
    x = 3,176.12

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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.