Home / 2,211.20-3,313.20-2,081.60

Finding the Fourth Proportional to 2,211.20, 3,313.20 and 2,081.60

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Solution

The fourth proportional to 2,211.20, 3,313.20 and 2,081.60 is: 3,119.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.20 : 3,313.20 = 2,081.60 : x
  2. Step 2: Convert to fraction form
    2,211.20/3,313.20 = 2,081.60/x
  3. Step 3: Cross multiply
    2,211.20x = 3,313.20 × 2,081.60
  4. Step 4: Simplify right side
    2,211.20x = 6,896,757.12
  5. Step 5: Solve for x
    x = 6,896,757.12/2,211.20
  6. Step 6: Final answer
    x = 3,119.01

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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.