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Finding the Third Proportional to 18,578 and 29,139

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Solution

The third proportional to 18,578 and 29,139 is: 45,703.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,578 : 29,139 = 29,139 : x
  2. Step 2: Convert to fraction form
    18,578/29,139 = 29,139/x
  3. Step 3: Cross multiply
    18,578x = 29,139 × 29,139
  4. Step 4: Simplify right side
    18,578x = 849,081,321
  5. Step 5: Solve for x
    x = 849,081,321/18,578
  6. Step 6: Final answer
    x = 45,703.59

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.