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Finding the Third Proportional to 19,721 and 43,006

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Solution

The third proportional to 19,721 and 43,006 is: 93,784.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721 : 43,006 = 43,006 : x
  2. Step 2: Convert to fraction form
    19,721/43,006 = 43,006/x
  3. Step 3: Cross multiply
    19,721x = 43,006 × 43,006
  4. Step 4: Simplify right side
    19,721x = 1,849,516,036
  5. Step 5: Solve for x
    x = 1,849,516,036/19,721
  6. Step 6: Final answer
    x = 93,784.09

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.