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Finding the Third Proportional to 12,868 and 29,890

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Solution

The third proportional to 12,868 and 29,890 is: 69,428.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868 : 29,890 = 29,890 : x
  2. Step 2: Convert to fraction form
    12,868/29,890 = 29,890/x
  3. Step 3: Cross multiply
    12,868x = 29,890 × 29,890
  4. Step 4: Simplify right side
    12,868x = 893,412,100
  5. Step 5: Solve for x
    x = 893,412,100/12,868
  6. Step 6: Final answer
    x = 69,428.98

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.