Home / 20,862.70-31,290.78-6,822.61

Finding the Fourth Proportional to 20,862.70, 31,290.78 and 6,822.61

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Solution

The fourth proportional to 20,862.70, 31,290.78 and 6,822.61 is: 10,232.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.70 : 31,290.78 = 6,822.61 : x
  2. Step 2: Convert to fraction form
    20,862.70/31,290.78 = 6,822.61/x
  3. Step 3: Cross multiply
    20,862.70x = 31,290.78 × 6,822.61
  4. Step 4: Simplify right side
    20,862.70x = 213,484,788.54
  5. Step 5: Solve for x
    x = 213,484,788.54/20,862.70
  6. Step 6: Final answer
    x = 10,232.85

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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.