Home / 3,831.64-5,287.66-2,153.12

Finding the Fourth Proportional to 3,831.64, 5,287.66 and 2,153.12

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Solution

The fourth proportional to 3,831.64, 5,287.66 and 2,153.12 is: 2,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,831.64 : 5,287.66 = 2,153.12 : x
  2. Step 2: Convert to fraction form
    3,831.64/5,287.66 = 2,153.12/x
  3. Step 3: Cross multiply
    3,831.64x = 5,287.66 × 2,153.12
  4. Step 4: Simplify right side
    3,831.64x = 11,384,934.68
  5. Step 5: Solve for x
    x = 11,384,934.68/3,831.64
  6. Step 6: Final answer
    x = 2,971.30

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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.