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Finding the Fourth Proportional to 7,274.50, 10,912.20 and 2,080.78

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Solution

The fourth proportional to 7,274.50, 10,912.20 and 2,080.78 is: 3,121.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,274.50 : 10,912.20 = 2,080.78 : x
  2. Step 2: Convert to fraction form
    7,274.50/10,912.20 = 2,080.78/x
  3. Step 3: Cross multiply
    7,274.50x = 10,912.20 × 2,080.78
  4. Step 4: Simplify right side
    7,274.50x = 22,705,887.52
  5. Step 5: Solve for x
    x = 22,705,887.52/7,274.50
  6. Step 6: Final answer
    x = 3,121.30

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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.