Home / 20,831.94-28,747.97-11,400.48

Finding the Fourth Proportional to 20,831.94, 28,747.97 and 11,400.48

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Solution

The fourth proportional to 20,831.94, 28,747.97 and 11,400.48 is: 15,732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.94 : 28,747.97 = 11,400.48 : x
  2. Step 2: Convert to fraction form
    20,831.94/28,747.97 = 11,400.48/x
  3. Step 3: Cross multiply
    20,831.94x = 28,747.97 × 11,400.48
  4. Step 4: Simplify right side
    20,831.94x = 327,740,600.02
  5. Step 5: Solve for x
    x = 327,740,600.02/20,831.94
  6. Step 6: Final answer
    x = 15,732.60

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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.