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Finding the Third Proportional to 21,339 and 29,821.50

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Solution

The third proportional to 21,339 and 29,821.50 is: 41,675.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,339 : 29,821.50 = 29,821.50 : x
  2. Step 2: Convert to fraction form
    21,339/29,821.50 = 29,821.50/x
  3. Step 3: Cross multiply
    21,339x = 29,821.50 × 29,821.50
  4. Step 4: Simplify right side
    21,339x = 889,321,862.25
  5. Step 5: Solve for x
    x = 889,321,862.25/21,339
  6. Step 6: Final answer
    x = 41,675.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.