Home / 20,817.09-31,198.80-18,137.82

Finding the Fourth Proportional to 20,817.09, 31,198.80 and 18,137.82

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Solution

The fourth proportional to 20,817.09, 31,198.80 and 18,137.82 is: 27,183.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.09 : 31,198.80 = 18,137.82 : x
  2. Step 2: Convert to fraction form
    20,817.09/31,198.80 = 18,137.82/x
  3. Step 3: Cross multiply
    20,817.09x = 31,198.80 × 18,137.82
  4. Step 4: Simplify right side
    20,817.09x = 565,878,218.62
  5. Step 5: Solve for x
    x = 565,878,218.62/20,817.09
  6. Step 6: Final answer
    x = 27,183.35

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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.