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Finding the Third Proportional to 18,556 and 28,720

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Solution

The third proportional to 18,556 and 28,720 is: 44,451.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,556 : 28,720 = 28,720 : x
  2. Step 2: Convert to fraction form
    18,556/28,720 = 28,720/x
  3. Step 3: Cross multiply
    18,556x = 28,720 × 28,720
  4. Step 4: Simplify right side
    18,556x = 824,838,400
  5. Step 5: Solve for x
    x = 824,838,400/18,556
  6. Step 6: Final answer
    x = 44,451.30

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.