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Finding the Third Proportional to 21,937 and 29,989

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Solution

The third proportional to 21,937 and 29,989 is: 40,996.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,937 : 29,989 = 29,989 : x
  2. Step 2: Convert to fraction form
    21,937/29,989 = 29,989/x
  3. Step 3: Cross multiply
    21,937x = 29,989 × 29,989
  4. Step 4: Simplify right side
    21,937x = 899,340,121
  5. Step 5: Solve for x
    x = 899,340,121/21,937
  6. Step 6: Final answer
    x = 40,996.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.