Home / 2,728.45-4,086.60-2,108.80

Finding the Fourth Proportional to 2,728.45, 4,086.60 and 2,108.80

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Solution

The fourth proportional to 2,728.45, 4,086.60 and 2,108.80 is: 3,158.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.45 : 4,086.60 = 2,108.80 : x
  2. Step 2: Convert to fraction form
    2,728.45/4,086.60 = 2,108.80/x
  3. Step 3: Cross multiply
    2,728.45x = 4,086.60 × 2,108.80
  4. Step 4: Simplify right side
    2,728.45x = 8,617,822.08
  5. Step 5: Solve for x
    x = 8,617,822.08/2,728.45
  6. Step 6: Final answer
    x = 3,158.50

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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.