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Finding the Third Proportional to 6,421 and 13,810

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Solution

The third proportional to 6,421 and 13,810 is: 29,701.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421 : 13,810 = 13,810 : x
  2. Step 2: Convert to fraction form
    6,421/13,810 = 13,810/x
  3. Step 3: Cross multiply
    6,421x = 13,810 × 13,810
  4. Step 4: Simplify right side
    6,421x = 190,716,100
  5. Step 5: Solve for x
    x = 190,716,100/6,421
  6. Step 6: Final answer
    x = 29,701.93

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.