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Finding the Third Proportional to 21,689 and 47,346

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Solution

The third proportional to 21,689 and 47,346 is: 103,353.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,689 : 47,346 = 47,346 : x
  2. Step 2: Convert to fraction form
    21,689/47,346 = 47,346/x
  3. Step 3: Cross multiply
    21,689x = 47,346 × 47,346
  4. Step 4: Simplify right side
    21,689x = 2,241,643,716
  5. Step 5: Solve for x
    x = 2,241,643,716/21,689
  6. Step 6: Final answer
    x = 103,353.95

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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.