Home / 2,154.60-3,231.90-2,122.20

Finding the Fourth Proportional to 2,154.60, 3,231.90 and 2,122.20

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Solution

The fourth proportional to 2,154.60, 3,231.90 and 2,122.20 is: 3,183.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.60 : 3,231.90 = 2,122.20 : x
  2. Step 2: Convert to fraction form
    2,154.60/3,231.90 = 2,122.20/x
  3. Step 3: Cross multiply
    2,154.60x = 3,231.90 × 2,122.20
  4. Step 4: Simplify right side
    2,154.60x = 6,858,738.18
  5. Step 5: Solve for x
    x = 6,858,738.18/2,154.60
  6. Step 6: Final answer
    x = 3,183.30

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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.