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Finding the Third Proportional to 7,128.84 and 9,325.13

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Solution

The third proportional to 7,128.84 and 9,325.13 is: 12,198.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.84 : 9,325.13 = 9,325.13 : x
  2. Step 2: Convert to fraction form
    7,128.84/9,325.13 = 9,325.13/x
  3. Step 3: Cross multiply
    7,128.84x = 9,325.13 × 9,325.13
  4. Step 4: Simplify right side
    7,128.84x = 86,957,956.27
  5. Step 5: Solve for x
    x = 86,957,956.27/7,128.84
  6. Step 6: Final answer
    x = 12,198.04

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.