Home / 3,831.21-5,286.91-2,152.76

Finding the Fourth Proportional to 3,831.21, 5,286.91 and 2,152.76

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Solution

The fourth proportional to 3,831.21, 5,286.91 and 2,152.76 is: 2,970.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.21 : 5,286.91 = 2,152.76 : x
  2. Step 2: Convert to fraction form
    3,831.21/5,286.91 = 2,152.76/x
  3. Step 3: Cross multiply
    3,831.21x = 5,286.91 × 2,152.76
  4. Step 4: Simplify right side
    3,831.21x = 11,381,448.37
  5. Step 5: Solve for x
    x = 11,381,448.37/3,831.21
  6. Step 6: Final answer
    x = 2,970.72

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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.