Home / 11,991.12-17,975.72-4,195.68

Finding the Fourth Proportional to 11,991.12, 17,975.72 and 4,195.68

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Solution

The fourth proportional to 11,991.12, 17,975.72 and 4,195.68 is: 6,289.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.12 : 17,975.72 = 4,195.68 : x
  2. Step 2: Convert to fraction form
    11,991.12/17,975.72 = 4,195.68/x
  3. Step 3: Cross multiply
    11,991.12x = 17,975.72 × 4,195.68
  4. Step 4: Simplify right side
    11,991.12x = 75,420,258.03
  5. Step 5: Solve for x
    x = 75,420,258.03/11,991.12
  6. Step 6: Final answer
    x = 6,289.68

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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.