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Finding the Third Proportional to 7,144.50 and 11,409

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Solution

The third proportional to 7,144.50 and 11,409 is: 18,218.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,144.50 : 11,409 = 11,409 : x
  2. Step 2: Convert to fraction form
    7,144.50/11,409 = 11,409/x
  3. Step 3: Cross multiply
    7,144.50x = 11,409 × 11,409
  4. Step 4: Simplify right side
    7,144.50x = 130,165,281
  5. Step 5: Solve for x
    x = 130,165,281/7,144.50
  6. Step 6: Final answer
    x = 18,218.95

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.