Home / 11,912.67-17,870.63-4,122.09

Finding the Fourth Proportional to 11,912.67, 17,870.63 and 4,122.09

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Solution

The fourth proportional to 11,912.67, 17,870.63 and 4,122.09 is: 6,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,912.67 : 17,870.63 = 4,122.09 : x
  2. Step 2: Convert to fraction form
    11,912.67/17,870.63 = 4,122.09/x
  3. Step 3: Cross multiply
    11,912.67x = 17,870.63 × 4,122.09
  4. Step 4: Simplify right side
    11,912.67x = 73,664,324.61
  5. Step 5: Solve for x
    x = 73,664,324.61/11,912.67
  6. Step 6: Final answer
    x = 6,183.70

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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.