Home / 2,819.26-3,888.22-2,112.77

Finding the Fourth Proportional to 2,819.26, 3,888.22 and 2,112.77

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Solution

The fourth proportional to 2,819.26, 3,888.22 and 2,112.77 is: 2,913.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.26 : 3,888.22 = 2,112.77 : x
  2. Step 2: Convert to fraction form
    2,819.26/3,888.22 = 2,112.77/x
  3. Step 3: Cross multiply
    2,819.26x = 3,888.22 × 2,112.77
  4. Step 4: Simplify right side
    2,819.26x = 8,214,914.57
  5. Step 5: Solve for x
    x = 8,214,914.57/2,819.26
  6. Step 6: Final answer
    x = 2,913.85

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1.5x scale

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.