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Finding the Third Proportional to 15,217.88 and 21,718.13

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Solution

The third proportional to 15,217.88 and 21,718.13 is: 30,994.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,217.88 : 21,718.13 = 21,718.13 : x
  2. Step 2: Convert to fraction form
    15,217.88/21,718.13 = 21,718.13/x
  3. Step 3: Cross multiply
    15,217.88x = 21,718.13 × 21,718.13
  4. Step 4: Simplify right side
    15,217.88x = 471,676,953.52
  5. Step 5: Solve for x
    x = 471,676,953.52/15,217.88
  6. Step 6: Final answer
    x = 30,994.93

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.