Home / 3,831.10-5,286.91-2,152.55

Finding the Fourth Proportional to 3,831.10, 5,286.91 and 2,152.55

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Solution

The fourth proportional to 3,831.10, 5,286.91 and 2,152.55 is: 2,970.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.10 : 5,286.91 = 2,152.55 : x
  2. Step 2: Convert to fraction form
    3,831.10/5,286.91 = 2,152.55/x
  3. Step 3: Cross multiply
    3,831.10x = 5,286.91 × 2,152.55
  4. Step 4: Simplify right side
    3,831.10x = 11,380,338.12
  5. Step 5: Solve for x
    x = 11,380,338.12/3,831.10
  6. Step 6: Final answer
    x = 2,970.51

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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.