Home / 21,195.05-31,796.22-8,721.86

Finding the Fourth Proportional to 21,195.05, 31,796.22 and 8,721.86

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Solution

The fourth proportional to 21,195.05, 31,796.22 and 8,721.86 is: 13,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,195.05 : 31,796.22 = 8,721.86 : x
  2. Step 2: Convert to fraction form
    21,195.05/31,796.22 = 8,721.86/x
  3. Step 3: Cross multiply
    21,195.05x = 31,796.22 × 8,721.86
  4. Step 4: Simplify right side
    21,195.05x = 277,322,179.37
  5. Step 5: Solve for x
    x = 277,322,179.37/21,195.05
  6. Step 6: Final answer
    x = 13,084.29

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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.