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Finding the Fourth Proportional to 10,620.90, 15,932.43 and 3,227.22

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Solution

The fourth proportional to 10,620.90, 15,932.43 and 3,227.22 is: 4,841.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,620.90 : 15,932.43 = 3,227.22 : x
  2. Step 2: Convert to fraction form
    10,620.90/15,932.43 = 3,227.22/x
  3. Step 3: Cross multiply
    10,620.90x = 15,932.43 × 3,227.22
  4. Step 4: Simplify right side
    10,620.90x = 51,417,456.74
  5. Step 5: Solve for x
    x = 51,417,456.74/10,620.90
  6. Step 6: Final answer
    x = 4,841.16

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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.