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Finding the Third Proportional to 21,376 and 35,712

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Solution

The third proportional to 21,376 and 35,712 is: 59,662.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,376 : 35,712 = 35,712 : x
  2. Step 2: Convert to fraction form
    21,376/35,712 = 35,712/x
  3. Step 3: Cross multiply
    21,376x = 35,712 × 35,712
  4. Step 4: Simplify right side
    21,376x = 1,275,346,944
  5. Step 5: Solve for x
    x = 1,275,346,944/21,376
  6. Step 6: Final answer
    x = 59,662.56

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.