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Finding the Third Proportional to 7,188 and 12,621

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Solution

The third proportional to 7,188 and 12,621 is: 22,160.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188 : 12,621 = 12,621 : x
  2. Step 2: Convert to fraction form
    7,188/12,621 = 12,621/x
  3. Step 3: Cross multiply
    7,188x = 12,621 × 12,621
  4. Step 4: Simplify right side
    7,188x = 159,289,641
  5. Step 5: Solve for x
    x = 159,289,641/7,188
  6. Step 6: Final answer
    x = 22,160.50

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.