Home / 3,986.20-5,501.46-2,218.60

Finding the Fourth Proportional to 3,986.20, 5,501.46 and 2,218.60

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Solution

The fourth proportional to 3,986.20, 5,501.46 and 2,218.60 is: 3,061.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.20 : 5,501.46 = 2,218.60 : x
  2. Step 2: Convert to fraction form
    3,986.20/5,501.46 = 2,218.60/x
  3. Step 3: Cross multiply
    3,986.20x = 5,501.46 × 2,218.60
  4. Step 4: Simplify right side
    3,986.20x = 12,205,539.16
  5. Step 5: Solve for x
    x = 12,205,539.16/3,986.20
  6. Step 6: Final answer
    x = 3,061.95

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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.