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Finding the Fourth Proportional to 20,568.88, 30,853.30 and 6,717.88

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Solution

The fourth proportional to 20,568.88, 30,853.30 and 6,717.88 is: 10,076.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.88 : 30,853.30 = 6,717.88 : x
  2. Step 2: Convert to fraction form
    20,568.88/30,853.30 = 6,717.88/x
  3. Step 3: Cross multiply
    20,568.88x = 30,853.30 × 6,717.88
  4. Step 4: Simplify right side
    20,568.88x = 207,268,767.00
  5. Step 5: Solve for x
    x = 207,268,767.00/20,568.88
  6. Step 6: Final answer
    x = 10,076.81

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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.