Home / 21,180.30-29,229.03-11,620.20

Finding the Fourth Proportional to 21,180.30, 29,229.03 and 11,620.20

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Solution

The fourth proportional to 21,180.30, 29,229.03 and 11,620.20 is: 16,035.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.30 : 29,229.03 = 11,620.20 : x
  2. Step 2: Convert to fraction form
    21,180.30/29,229.03 = 11,620.20/x
  3. Step 3: Cross multiply
    21,180.30x = 29,229.03 × 11,620.20
  4. Step 4: Simplify right side
    21,180.30x = 339,647,174.41
  5. Step 5: Solve for x
    x = 339,647,174.41/21,180.30
  6. Step 6: Final answer
    x = 16,035.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.