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Finding the Third Proportional to 7,120 and 8,308

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Solution

The third proportional to 7,120 and 8,308 is: 9,694.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120 : 8,308 = 8,308 : x
  2. Step 2: Convert to fraction form
    7,120/8,308 = 8,308/x
  3. Step 3: Cross multiply
    7,120x = 8,308 × 8,308
  4. Step 4: Simplify right side
    7,120x = 69,022,864
  5. Step 5: Solve for x
    x = 69,022,864/7,120
  6. Step 6: Final answer
    x = 9,694.22

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.