Home / 3,831.11-5,286.61-2,152.39

Finding the Fourth Proportional to 3,831.11, 5,286.61 and 2,152.39

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Solution

The fourth proportional to 3,831.11, 5,286.61 and 2,152.39 is: 2,970.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.11 : 5,286.61 = 2,152.39 : x
  2. Step 2: Convert to fraction form
    3,831.11/5,286.61 = 2,152.39/x
  3. Step 3: Cross multiply
    3,831.11x = 5,286.61 × 2,152.39
  4. Step 4: Simplify right side
    3,831.11x = 11,378,827.90
  5. Step 5: Solve for x
    x = 11,378,827.90/3,831.11
  6. Step 6: Final answer
    x = 2,970.11

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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.