Home / 20,939.73-31,415.70-8,453.37

Finding the Fourth Proportional to 20,939.73, 31,415.70 and 8,453.37

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Solution

The fourth proportional to 20,939.73, 31,415.70 and 8,453.37 is: 12,682.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.73 : 31,415.70 = 8,453.37 : x
  2. Step 2: Convert to fraction form
    20,939.73/31,415.70 = 8,453.37/x
  3. Step 3: Cross multiply
    20,939.73x = 31,415.70 × 8,453.37
  4. Step 4: Simplify right side
    20,939.73x = 265,568,535.91
  5. Step 5: Solve for x
    x = 265,568,535.91/20,939.73
  6. Step 6: Final answer
    x = 12,682.52

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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.