Home / 3,540.80-5,311.20-2,158.40

Finding the Fourth Proportional to 3,540.80, 5,311.20 and 2,158.40

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Solution

The fourth proportional to 3,540.80, 5,311.20 and 2,158.40 is: 3,237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540.80 : 5,311.20 = 2,158.40 : x
  2. Step 2: Convert to fraction form
    3,540.80/5,311.20 = 2,158.40/x
  3. Step 3: Cross multiply
    3,540.80x = 5,311.20 × 2,158.40
  4. Step 4: Simplify right side
    3,540.80x = 11,463,694.08
  5. Step 5: Solve for x
    x = 11,463,694.08/3,540.80
  6. Step 6: Final answer
    x = 3,237.60

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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.