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Finding the Third Proportional to 4,631.44 and 9,991.88

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Solution

The third proportional to 4,631.44 and 9,991.88 is: 21,556.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,631.44 : 9,991.88 = 9,991.88 : x
  2. Step 2: Convert to fraction form
    4,631.44/9,991.88 = 9,991.88/x
  3. Step 3: Cross multiply
    4,631.44x = 9,991.88 × 9,991.88
  4. Step 4: Simplify right side
    4,631.44x = 99,837,566.02
  5. Step 5: Solve for x
    x = 99,837,566.02/4,631.44
  6. Step 6: Final answer
    x = 21,556.50

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.