Home / 20,939.61-31,414.04-6,899.07

Finding the Fourth Proportional to 20,939.61, 31,414.04 and 6,899.07

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Solution

The fourth proportional to 20,939.61, 31,414.04 and 6,899.07 is: 10,350.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.61 : 31,414.04 = 6,899.07 : x
  2. Step 2: Convert to fraction form
    20,939.61/31,414.04 = 6,899.07/x
  3. Step 3: Cross multiply
    20,939.61x = 31,414.04 × 6,899.07
  4. Step 4: Simplify right side
    20,939.61x = 216,727,503.87
  5. Step 5: Solve for x
    x = 216,727,503.87/20,939.61
  6. Step 6: Final answer
    x = 10,350.12

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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.