Home / 21,169.94-31,786.16-11,828.30

Finding the Fourth Proportional to 21,169.94, 31,786.16 and 11,828.30

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Solution

The fourth proportional to 21,169.94, 31,786.16 and 11,828.30 is: 17,759.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.94 : 31,786.16 = 11,828.30 : x
  2. Step 2: Convert to fraction form
    21,169.94/31,786.16 = 11,828.30/x
  3. Step 3: Cross multiply
    21,169.94x = 31,786.16 × 11,828.30
  4. Step 4: Simplify right side
    21,169.94x = 375,976,018.26
  5. Step 5: Solve for x
    x = 375,976,018.26/21,169.94
  6. Step 6: Final answer
    x = 17,759.90

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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.