Home / 3,680.40-5,520.60-2,125.20

Finding the Fourth Proportional to 3,680.40, 5,520.60 and 2,125.20

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Solution

The fourth proportional to 3,680.40, 5,520.60 and 2,125.20 is: 3,187.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,680.40 : 5,520.60 = 2,125.20 : x
  2. Step 2: Convert to fraction form
    3,680.40/5,520.60 = 2,125.20/x
  3. Step 3: Cross multiply
    3,680.40x = 5,520.60 × 2,125.20
  4. Step 4: Simplify right side
    3,680.40x = 11,732,379.12
  5. Step 5: Solve for x
    x = 11,732,379.12/3,680.40
  6. Step 6: Final answer
    x = 3,187.80

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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.