Home / 3,891.56-5,370.16-2,212.96

Finding the Fourth Proportional to 3,891.56, 5,370.16 and 2,212.96

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Solution

The fourth proportional to 3,891.56, 5,370.16 and 2,212.96 is: 3,053.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.56 : 5,370.16 = 2,212.96 : x
  2. Step 2: Convert to fraction form
    3,891.56/5,370.16 = 2,212.96/x
  3. Step 3: Cross multiply
    3,891.56x = 5,370.16 × 2,212.96
  4. Step 4: Simplify right side
    3,891.56x = 11,883,949.27
  5. Step 5: Solve for x
    x = 11,883,949.27/3,891.56
  6. Step 6: Final answer
    x = 3,053.78

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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.