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Finding the Third Proportional to 21,519 and 28,918.50

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Solution

The third proportional to 21,519 and 28,918.50 is: 38,862.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,519 : 28,918.50 = 28,918.50 : x
  2. Step 2: Convert to fraction form
    21,519/28,918.50 = 28,918.50/x
  3. Step 3: Cross multiply
    21,519x = 28,918.50 × 28,918.50
  4. Step 4: Simplify right side
    21,519x = 836,279,642.25
  5. Step 5: Solve for x
    x = 836,279,642.25/21,519
  6. Step 6: Final answer
    x = 38,862.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.