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Finding the Third Proportional to 6,421 and 13,838

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Solution

The third proportional to 6,421 and 13,838 is: 29,822.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421 : 13,838 = 13,838 : x
  2. Step 2: Convert to fraction form
    6,421/13,838 = 13,838/x
  3. Step 3: Cross multiply
    6,421x = 13,838 × 13,838
  4. Step 4: Simplify right side
    6,421x = 191,490,244
  5. Step 5: Solve for x
    x = 191,490,244/6,421
  6. Step 6: Final answer
    x = 29,822.50

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.