Home / 4,917.76-6,786.42-2,821.72

Finding the Fourth Proportional to 4,917.76, 6,786.42 and 2,821.72

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Solution

The fourth proportional to 4,917.76, 6,786.42 and 2,821.72 is: 3,893.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,917.76 : 6,786.42 = 2,821.72 : x
  2. Step 2: Convert to fraction form
    4,917.76/6,786.42 = 2,821.72/x
  3. Step 3: Cross multiply
    4,917.76x = 6,786.42 × 2,821.72
  4. Step 4: Simplify right side
    4,917.76x = 19,149,377.04
  5. Step 5: Solve for x
    x = 19,149,377.04/4,917.76
  6. Step 6: Final answer
    x = 3,893.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.