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Finding the Third Proportional to 18,666 and 28,389

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Solution

The third proportional to 18,666 and 28,389 is: 43,176.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666 : 28,389 = 28,389 : x
  2. Step 2: Convert to fraction form
    18,666/28,389 = 28,389/x
  3. Step 3: Cross multiply
    18,666x = 28,389 × 28,389
  4. Step 4: Simplify right side
    18,666x = 805,935,321
  5. Step 5: Solve for x
    x = 805,935,321/18,666
  6. Step 6: Final answer
    x = 43,176.65

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.