Home / 3,831.09-5,286.61-2,151.96

Finding the Fourth Proportional to 3,831.09, 5,286.61 and 2,151.96

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Solution

The fourth proportional to 3,831.09, 5,286.61 and 2,151.96 is: 2,969.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.09 : 5,286.61 = 2,151.96 : x
  2. Step 2: Convert to fraction form
    3,831.09/5,286.61 = 2,151.96/x
  3. Step 3: Cross multiply
    3,831.09x = 5,286.61 × 2,151.96
  4. Step 4: Simplify right side
    3,831.09x = 11,376,573.26
  5. Step 5: Solve for x
    x = 11,376,573.26/3,831.09
  6. Step 6: Final answer
    x = 2,969.54

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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.