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Finding the Fourth Proportional to 21,388.56, 32,085.48 and 7,351.44

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Solution

The fourth proportional to 21,388.56, 32,085.48 and 7,351.44 is: 11,028.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.56 : 32,085.48 = 7,351.44 : x
  2. Step 2: Convert to fraction form
    21,388.56/32,085.48 = 7,351.44/x
  3. Step 3: Cross multiply
    21,388.56x = 32,085.48 × 7,351.44
  4. Step 4: Simplify right side
    21,388.56x = 235,874,481.09
  5. Step 5: Solve for x
    x = 235,874,481.09/21,388.56
  6. Step 6: Final answer
    x = 11,028.07

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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.