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Finding the Third Proportional to 7,155.21 and 10,936.90

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Solution

The third proportional to 7,155.21 and 10,936.90 is: 16,717.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,155.21 : 10,936.90 = 10,936.90 : x
  2. Step 2: Convert to fraction form
    7,155.21/10,936.90 = 10,936.90/x
  3. Step 3: Cross multiply
    7,155.21x = 10,936.90 × 10,936.90
  4. Step 4: Simplify right side
    7,155.21x = 119,615,747.43
  5. Step 5: Solve for x
    x = 119,615,747.43/7,155.21
  6. Step 6: Final answer
    x = 16,717.29

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.