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Finding the Third Proportional to 13,403 and 18,520

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Solution

The third proportional to 13,403 and 18,520 is: 25,590.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,403 : 18,520 = 18,520 : x
  2. Step 2: Convert to fraction form
    13,403/18,520 = 18,520/x
  3. Step 3: Cross multiply
    13,403x = 18,520 × 18,520
  4. Step 4: Simplify right side
    13,403x = 342,990,400
  5. Step 5: Solve for x
    x = 342,990,400/13,403
  6. Step 6: Final answer
    x = 25,590.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.