Home / 11,887.38-17,831.34-3,989.88

Finding the Fourth Proportional to 11,887.38, 17,831.34 and 3,989.88

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Solution

The fourth proportional to 11,887.38, 17,831.34 and 3,989.88 is: 5,984.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,887.38 : 17,831.34 = 3,989.88 : x
  2. Step 2: Convert to fraction form
    11,887.38/17,831.34 = 3,989.88/x
  3. Step 3: Cross multiply
    11,887.38x = 17,831.34 × 3,989.88
  4. Step 4: Simplify right side
    11,887.38x = 71,144,906.84
  5. Step 5: Solve for x
    x = 71,144,906.84/11,887.38
  6. Step 6: Final answer
    x = 5,984.91

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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.