Home / 7,917.20-11,877.55-2,986.86

Finding the Fourth Proportional to 7,917.20, 11,877.55 and 2,986.86

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Solution

The fourth proportional to 7,917.20, 11,877.55 and 2,986.86 is: 4,480.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.20 : 11,877.55 = 2,986.86 : x
  2. Step 2: Convert to fraction form
    7,917.20/11,877.55 = 2,986.86/x
  3. Step 3: Cross multiply
    7,917.20x = 11,877.55 × 2,986.86
  4. Step 4: Simplify right side
    7,917.20x = 35,476,578.99
  5. Step 5: Solve for x
    x = 35,476,578.99/7,917.20
  6. Step 6: Final answer
    x = 4,480.95

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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.