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Finding the Third Proportional to 7,640 and 11,506

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Solution

The third proportional to 7,640 and 11,506 is: 17,328.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,640 : 11,506 = 11,506 : x
  2. Step 2: Convert to fraction form
    7,640/11,506 = 11,506/x
  3. Step 3: Cross multiply
    7,640x = 11,506 × 11,506
  4. Step 4: Simplify right side
    7,640x = 132,388,036
  5. Step 5: Solve for x
    x = 132,388,036/7,640
  6. Step 6: Final answer
    x = 17,328.28

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.