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Finding the Third Proportional to 3,321.84 and 7,191.28

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Solution

The third proportional to 3,321.84 and 7,191.28 is: 15,568.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,321.84 : 7,191.28 = 7,191.28 : x
  2. Step 2: Convert to fraction form
    3,321.84/7,191.28 = 7,191.28/x
  3. Step 3: Cross multiply
    3,321.84x = 7,191.28 × 7,191.28
  4. Step 4: Simplify right side
    3,321.84x = 51,714,526.02
  5. Step 5: Solve for x
    x = 51,714,526.02/3,321.84
  6. Step 6: Final answer
    x = 15,568.02

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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.