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Finding the Third Proportional to 9,640 and 14,124

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Solution

The third proportional to 9,640 and 14,124 is: 20,693.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,640 : 14,124 = 14,124 : x
  2. Step 2: Convert to fraction form
    9,640/14,124 = 14,124/x
  3. Step 3: Cross multiply
    9,640x = 14,124 × 14,124
  4. Step 4: Simplify right side
    9,640x = 199,487,376
  5. Step 5: Solve for x
    x = 199,487,376/9,640
  6. Step 6: Final answer
    x = 20,693.71

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.