Home / 3,790.67-5,231.07-2,112.20

Finding the Fourth Proportional to 3,790.67, 5,231.07 and 2,112.20

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Solution

The fourth proportional to 3,790.67, 5,231.07 and 2,112.20 is: 2,914.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,790.67 : 5,231.07 = 2,112.20 : x
  2. Step 2: Convert to fraction form
    3,790.67/5,231.07 = 2,112.20/x
  3. Step 3: Cross multiply
    3,790.67x = 5,231.07 × 2,112.20
  4. Step 4: Simplify right side
    3,790.67x = 11,049,066.05
  5. Step 5: Solve for x
    x = 11,049,066.05/3,790.67
  6. Step 6: Final answer
    x = 2,914.81

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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.