Home / 20,826.68-31,239.60-5,243.88

Finding the Fourth Proportional to 20,826.68, 31,239.60 and 5,243.88

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Solution

The fourth proportional to 20,826.68, 31,239.60 and 5,243.88 is: 7,865.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.68 : 31,239.60 = 5,243.88 : x
  2. Step 2: Convert to fraction form
    20,826.68/31,239.60 = 5,243.88/x
  3. Step 3: Cross multiply
    20,826.68x = 31,239.60 × 5,243.88
  4. Step 4: Simplify right side
    20,826.68x = 163,816,713.65
  5. Step 5: Solve for x
    x = 163,816,713.65/20,826.68
  6. Step 6: Final answer
    x = 7,865.71

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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.