Home / 20,880.28-31,304.34-6,831.79

Finding the Fourth Proportional to 20,880.28, 31,304.34 and 6,831.79

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Solution

The fourth proportional to 20,880.28, 31,304.34 and 6,831.79 is: 10,242.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.28 : 31,304.34 = 6,831.79 : x
  2. Step 2: Convert to fraction form
    20,880.28/31,304.34 = 6,831.79/x
  3. Step 3: Cross multiply
    20,880.28x = 31,304.34 × 6,831.79
  4. Step 4: Simplify right side
    20,880.28x = 213,864,676.97
  5. Step 5: Solve for x
    x = 213,864,676.97/20,880.28
  6. Step 6: Final answer
    x = 10,242.42

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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.