Home / 11,912.28-17,869.62-4,120.08

Finding the Fourth Proportional to 11,912.28, 17,869.62 and 4,120.08

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Solution

The fourth proportional to 11,912.28, 17,869.62 and 4,120.08 is: 6,180.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,912.28 : 17,869.62 = 4,120.08 : x
  2. Step 2: Convert to fraction form
    11,912.28/17,869.62 = 4,120.08/x
  3. Step 3: Cross multiply
    11,912.28x = 17,869.62 × 4,120.08
  4. Step 4: Simplify right side
    11,912.28x = 73,624,263.97
  5. Step 5: Solve for x
    x = 73,624,263.97/11,912.28
  6. Step 6: Final answer
    x = 6,180.54

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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.