Home / 20,774.76-31,112.46-11,983.02

Finding the Fourth Proportional to 20,774.76, 31,112.46 and 11,983.02

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Solution

The fourth proportional to 20,774.76, 31,112.46 and 11,983.02 is: 17,945.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.76 : 31,112.46 = 11,983.02 : x
  2. Step 2: Convert to fraction form
    20,774.76/31,112.46 = 11,983.02/x
  3. Step 3: Cross multiply
    20,774.76x = 31,112.46 × 11,983.02
  4. Step 4: Simplify right side
    20,774.76x = 372,821,230.43
  5. Step 5: Solve for x
    x = 372,821,230.43/20,774.76
  6. Step 6: Final answer
    x = 17,945.87

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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.