Home / 5,221.38-7,831.86-2,100.48

Finding the Fourth Proportional to 5,221.38, 7,831.86 and 2,100.48

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Solution

The fourth proportional to 5,221.38, 7,831.86 and 2,100.48 is: 3,150.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,221.38 : 7,831.86 = 2,100.48 : x
  2. Step 2: Convert to fraction form
    5,221.38/7,831.86 = 2,100.48/x
  3. Step 3: Cross multiply
    5,221.38x = 7,831.86 × 2,100.48
  4. Step 4: Simplify right side
    5,221.38x = 16,450,665.29
  5. Step 5: Solve for x
    x = 16,450,665.29/5,221.38
  6. Step 6: Final answer
    x = 3,150.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.