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Finding the Third Proportional to 20,790 and 29,457

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Solution

The third proportional to 20,790 and 29,457 is: 41,737.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790 : 29,457 = 29,457 : x
  2. Step 2: Convert to fraction form
    20,790/29,457 = 29,457/x
  3. Step 3: Cross multiply
    20,790x = 29,457 × 29,457
  4. Step 4: Simplify right side
    20,790x = 867,714,849
  5. Step 5: Solve for x
    x = 867,714,849/20,790
  6. Step 6: Final answer
    x = 41,737.13

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.