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Finding the Third Proportional to 10,640 and 15,040

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Solution

The third proportional to 10,640 and 15,040 is: 21,259.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640 : 15,040 = 15,040 : x
  2. Step 2: Convert to fraction form
    10,640/15,040 = 15,040/x
  3. Step 3: Cross multiply
    10,640x = 15,040 × 15,040
  4. Step 4: Simplify right side
    10,640x = 226,201,600
  5. Step 5: Solve for x
    x = 226,201,600/10,640
  6. Step 6: Final answer
    x = 21,259.55

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.