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Finding the Third Proportional to 8,643 and 20,239

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Solution

The third proportional to 8,643 and 20,239 is: 47,392.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643 : 20,239 = 20,239 : x
  2. Step 2: Convert to fraction form
    8,643/20,239 = 20,239/x
  3. Step 3: Cross multiply
    8,643x = 20,239 × 20,239
  4. Step 4: Simplify right side
    8,643x = 409,617,121
  5. Step 5: Solve for x
    x = 409,617,121/8,643
  6. Step 6: Final answer
    x = 47,392.93

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Why These Related Problems?

These problems maintain the same ratio (2.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.