Home / 20,825.88-31,238.79-6,785.89

Finding the Fourth Proportional to 20,825.88, 31,238.79 and 6,785.89

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Solution

The fourth proportional to 20,825.88, 31,238.79 and 6,785.89 is: 10,178.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,825.88 : 31,238.79 = 6,785.89 : x
  2. Step 2: Convert to fraction form
    20,825.88/31,238.79 = 6,785.89/x
  3. Step 3: Cross multiply
    20,825.88x = 31,238.79 × 6,785.89
  4. Step 4: Simplify right side
    20,825.88x = 211,982,914.58
  5. Step 5: Solve for x
    x = 211,982,914.58/20,825.88
  6. Step 6: Final answer
    x = 10,178.82

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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.