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Finding the Third Proportional to 7,265.79 and 10,639.20

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Solution

The third proportional to 7,265.79 and 10,639.20 is: 15,578.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,265.79 : 10,639.20 = 10,639.20 : x
  2. Step 2: Convert to fraction form
    7,265.79/10,639.20 = 10,639.20/x
  3. Step 3: Cross multiply
    7,265.79x = 10,639.20 × 10,639.20
  4. Step 4: Simplify right side
    7,265.79x = 113,192,570.41
  5. Step 5: Solve for x
    x = 113,192,570.41/7,265.79
  6. Step 6: Final answer
    x = 15,578.83

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.