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Finding the Third Proportional to 19,212 and 29,640

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Solution

The third proportional to 19,212 and 29,640 is: 45,728.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,212 : 29,640 = 29,640 : x
  2. Step 2: Convert to fraction form
    19,212/29,640 = 29,640/x
  3. Step 3: Cross multiply
    19,212x = 29,640 × 29,640
  4. Step 4: Simplify right side
    19,212x = 878,529,600
  5. Step 5: Solve for x
    x = 878,529,600/19,212
  6. Step 6: Final answer
    x = 45,728.17

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.