Home / 20,826.47-31,239.67-6,786.47

Finding the Fourth Proportional to 20,826.47, 31,239.67 and 6,786.47

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Solution

The fourth proportional to 20,826.47, 31,239.67 and 6,786.47 is: 10,179.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.47 : 31,239.67 = 6,786.47 : x
  2. Step 2: Convert to fraction form
    20,826.47/31,239.67 = 6,786.47/x
  3. Step 3: Cross multiply
    20,826.47x = 31,239.67 × 6,786.47
  4. Step 4: Simplify right side
    20,826.47x = 212,007,083.26
  5. Step 5: Solve for x
    x = 212,007,083.26/20,826.47
  6. Step 6: Final answer
    x = 10,179.69

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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.