Home / 20,797.75-31,194.33-5,215.38

Finding the Fourth Proportional to 20,797.75, 31,194.33 and 5,215.38

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Solution

The fourth proportional to 20,797.75, 31,194.33 and 5,215.38 is: 7,822.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,797.75 : 31,194.33 = 5,215.38 : x
  2. Step 2: Convert to fraction form
    20,797.75/31,194.33 = 5,215.38/x
  3. Step 3: Cross multiply
    20,797.75x = 31,194.33 × 5,215.38
  4. Step 4: Simplify right side
    20,797.75x = 162,690,284.80
  5. Step 5: Solve for x
    x = 162,690,284.80/20,797.75
  6. Step 6: Final answer
    x = 7,822.49

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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.