Home / 20,896.78-31,350.24-12,017.79

Finding the Fourth Proportional to 20,896.78, 31,350.24 and 12,017.79

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Solution

The fourth proportional to 20,896.78, 31,350.24 and 12,017.79 is: 18,029.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.78 : 31,350.24 = 12,017.79 : x
  2. Step 2: Convert to fraction form
    20,896.78/31,350.24 = 12,017.79/x
  3. Step 3: Cross multiply
    20,896.78x = 31,350.24 × 12,017.79
  4. Step 4: Simplify right side
    20,896.78x = 376,760,673.27
  5. Step 5: Solve for x
    x = 376,760,673.27/20,896.78
  6. Step 6: Final answer
    x = 18,029.60

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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.