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Finding the Fourth Proportional to 12,262.95, 18,396.09 and 3,940.20

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Solution

The fourth proportional to 12,262.95, 18,396.09 and 3,940.20 is: 5,910.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,262.95 : 18,396.09 = 3,940.20 : x
  2. Step 2: Convert to fraction form
    12,262.95/18,396.09 = 3,940.20/x
  3. Step 3: Cross multiply
    12,262.95x = 18,396.09 × 3,940.20
  4. Step 4: Simplify right side
    12,262.95x = 72,484,273.82
  5. Step 5: Solve for x
    x = 72,484,273.82/12,262.95
  6. Step 6: Final answer
    x = 5,910.83

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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.