Home / 21,399.75-29,531.10-11,839.99

Finding the Fourth Proportional to 21,399.75, 29,531.10 and 11,839.99

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Solution

The fourth proportional to 21,399.75, 29,531.10 and 11,839.99 is: 16,338.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.75 : 29,531.10 = 11,839.99 : x
  2. Step 2: Convert to fraction form
    21,399.75/29,531.10 = 11,839.99/x
  3. Step 3: Cross multiply
    21,399.75x = 29,531.10 × 11,839.99
  4. Step 4: Simplify right side
    21,399.75x = 349,647,928.69
  5. Step 5: Solve for x
    x = 349,647,928.69/21,399.75
  6. Step 6: Final answer
    x = 16,338.88

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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.