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Finding the Fourth Proportional to 7,280.78, 10,921.74 and 2,601.80

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Solution

The fourth proportional to 7,280.78, 10,921.74 and 2,601.80 is: 3,902.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.78 : 10,921.74 = 2,601.80 : x
  2. Step 2: Convert to fraction form
    7,280.78/10,921.74 = 2,601.80/x
  3. Step 3: Cross multiply
    7,280.78x = 10,921.74 × 2,601.80
  4. Step 4: Simplify right side
    7,280.78x = 28,416,183.13
  5. Step 5: Solve for x
    x = 28,416,183.13/7,280.78
  6. Step 6: Final answer
    x = 3,902.90

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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.