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Finding the Third Proportional to 7,320.38 and 11,639.53

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Solution

The third proportional to 7,320.38 and 11,639.53 is: 18,507.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,320.38 : 11,639.53 = 11,639.53 : x
  2. Step 2: Convert to fraction form
    7,320.38/11,639.53 = 11,639.53/x
  3. Step 3: Cross multiply
    7,320.38x = 11,639.53 × 11,639.53
  4. Step 4: Simplify right side
    7,320.38x = 135,478,687.72
  5. Step 5: Solve for x
    x = 135,478,687.72/7,320.38
  6. Step 6: Final answer
    x = 18,507.07

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.