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Finding the Fourth Proportional to 7,280.08, 10,920.12 and 2,660.56

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Solution

The fourth proportional to 7,280.08, 10,920.12 and 2,660.56 is: 3,990.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.08 : 10,920.12 = 2,660.56 : x
  2. Step 2: Convert to fraction form
    7,280.08/10,920.12 = 2,660.56/x
  3. Step 3: Cross multiply
    7,280.08x = 10,920.12 × 2,660.56
  4. Step 4: Simplify right side
    7,280.08x = 29,053,634.47
  5. Step 5: Solve for x
    x = 29,053,634.47/7,280.08
  6. Step 6: Final answer
    x = 3,990.84

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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.