Home / 7,997.37-11,990.91-3,320.61

Finding the Fourth Proportional to 7,997.37, 11,990.91 and 3,320.61

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Solution

The fourth proportional to 7,997.37, 11,990.91 and 3,320.61 is: 4,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,997.37 : 11,990.91 = 3,320.61 : x
  2. Step 2: Convert to fraction form
    7,997.37/11,990.91 = 3,320.61/x
  3. Step 3: Cross multiply
    7,997.37x = 11,990.91 × 3,320.61
  4. Step 4: Simplify right side
    7,997.37x = 39,817,103.14
  5. Step 5: Solve for x
    x = 39,817,103.14/7,997.37
  6. Step 6: Final answer
    x = 4,978.78

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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.