Home / 21,198.52-31,760.37-12,861.61

Finding the Fourth Proportional to 21,198.52, 31,760.37 and 12,861.61

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Solution

The fourth proportional to 21,198.52, 31,760.37 and 12,861.61 is: 19,269.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.52 : 31,760.37 = 12,861.61 : x
  2. Step 2: Convert to fraction form
    21,198.52/31,760.37 = 12,861.61/x
  3. Step 3: Cross multiply
    21,198.52x = 31,760.37 × 12,861.61
  4. Step 4: Simplify right side
    21,198.52x = 408,489,448.06
  5. Step 5: Solve for x
    x = 408,489,448.06/21,198.52
  6. Step 6: Final answer
    x = 19,269.71

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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.