Home / 21,287.03-29,375.30-11,855.39

Finding the Fourth Proportional to 21,287.03, 29,375.30 and 11,855.39

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Solution

The fourth proportional to 21,287.03, 29,375.30 and 11,855.39 is: 16,359.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.03 : 29,375.30 = 11,855.39 : x
  2. Step 2: Convert to fraction form
    21,287.03/29,375.30 = 11,855.39/x
  3. Step 3: Cross multiply
    21,287.03x = 29,375.30 × 11,855.39
  4. Step 4: Simplify right side
    21,287.03x = 348,255,520.63
  5. Step 5: Solve for x
    x = 348,255,520.63/21,287.03
  6. Step 6: Final answer
    x = 16,359.99

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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.