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Finding the Third Proportional to 21,431.50 and 46,387

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Solution

The third proportional to 21,431.50 and 46,387 is: 100,401.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.50 : 46,387 = 46,387 : x
  2. Step 2: Convert to fraction form
    21,431.50/46,387 = 46,387/x
  3. Step 3: Cross multiply
    21,431.50x = 46,387 × 46,387
  4. Step 4: Simplify right side
    21,431.50x = 2,151,753,769
  5. Step 5: Solve for x
    x = 2,151,753,769/21,431.50
  6. Step 6: Final answer
    x = 100,401.45

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.