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Finding the Third Proportional to 21,381 and 33,585

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Solution

The third proportional to 21,381 and 33,585 is: 52,754.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381 : 33,585 = 33,585 : x
  2. Step 2: Convert to fraction form
    21,381/33,585 = 33,585/x
  3. Step 3: Cross multiply
    21,381x = 33,585 × 33,585
  4. Step 4: Simplify right side
    21,381x = 1,127,952,225
  5. Step 5: Solve for x
    x = 1,127,952,225/21,381
  6. Step 6: Final answer
    x = 52,754.89

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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.