Home / 20,939.81-31,414.34-6,899.27

Finding the Fourth Proportional to 20,939.81, 31,414.34 and 6,899.27

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Solution

The fourth proportional to 20,939.81, 31,414.34 and 6,899.27 is: 10,350.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.81 : 31,414.34 = 6,899.27 : x
  2. Step 2: Convert to fraction form
    20,939.81/31,414.34 = 6,899.27/x
  3. Step 3: Cross multiply
    20,939.81x = 31,414.34 × 6,899.27
  4. Step 4: Simplify right side
    20,939.81x = 216,735,952.24
  5. Step 5: Solve for x
    x = 216,735,952.24/20,939.81
  6. Step 6: Final answer
    x = 10,350.43

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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.