Home / 21,287.30-29,375.33-11,855.25

Finding the Fourth Proportional to 21,287.30, 29,375.33 and 11,855.25

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Solution

The fourth proportional to 21,287.30, 29,375.33 and 11,855.25 is: 16,359.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.30 : 29,375.33 = 11,855.25 : x
  2. Step 2: Convert to fraction form
    21,287.30/29,375.33 = 11,855.25/x
  3. Step 3: Cross multiply
    21,287.30x = 29,375.33 × 11,855.25
  4. Step 4: Simplify right side
    21,287.30x = 348,251,821.71
  5. Step 5: Solve for x
    x = 348,251,821.71/21,287.30
  6. Step 6: Final answer
    x = 16,359.61

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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.