Home / 20,983.30-31,511.40-11,141.80

Finding the Fourth Proportional to 20,983.30, 31,511.40 and 11,141.80

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Solution

The fourth proportional to 20,983.30, 31,511.40 and 11,141.80 is: 16,732.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.30 : 31,511.40 = 11,141.80 : x
  2. Step 2: Convert to fraction form
    20,983.30/31,511.40 = 11,141.80/x
  3. Step 3: Cross multiply
    20,983.30x = 31,511.40 × 11,141.80
  4. Step 4: Simplify right side
    20,983.30x = 351,093,716.52
  5. Step 5: Solve for x
    x = 351,093,716.52/20,983.30
  6. Step 6: Final answer
    x = 16,732.05

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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.