Home / 3,180.60-4,390.61-2,120.18

Finding the Fourth Proportional to 3,180.60, 4,390.61 and 2,120.18

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Solution

The fourth proportional to 3,180.60, 4,390.61 and 2,120.18 is: 2,926.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.60 : 4,390.61 = 2,120.18 : x
  2. Step 2: Convert to fraction form
    3,180.60/4,390.61 = 2,120.18/x
  3. Step 3: Cross multiply
    3,180.60x = 4,390.61 × 2,120.18
  4. Step 4: Simplify right side
    3,180.60x = 9,308,850.96
  5. Step 5: Solve for x
    x = 9,308,850.96/3,180.60
  6. Step 6: Final answer
    x = 2,926.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.