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Finding the Third Proportional to 15,822 and 21,465

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Solution

The third proportional to 15,822 and 21,465 is: 29,120.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,822 : 21,465 = 21,465 : x
  2. Step 2: Convert to fraction form
    15,822/21,465 = 21,465/x
  3. Step 3: Cross multiply
    15,822x = 21,465 × 21,465
  4. Step 4: Simplify right side
    15,822x = 460,746,225
  5. Step 5: Solve for x
    x = 460,746,225/15,822
  6. Step 6: Final answer
    x = 29,120.61

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.