Home / 3,831.50-5,287.57-2,152.81

Finding the Fourth Proportional to 3,831.50, 5,287.57 and 2,152.81

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Solution

The fourth proportional to 3,831.50, 5,287.57 and 2,152.81 is: 2,970.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.50 : 5,287.57 = 2,152.81 : x
  2. Step 2: Convert to fraction form
    3,831.50/5,287.57 = 2,152.81/x
  3. Step 3: Cross multiply
    3,831.50x = 5,287.57 × 2,152.81
  4. Step 4: Simplify right side
    3,831.50x = 11,383,120.62
  5. Step 5: Solve for x
    x = 11,383,120.62/3,831.50
  6. Step 6: Final answer
    x = 2,970.93

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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.