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Finding the Third Proportional to 13,491 and 18,409.50

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Solution

The third proportional to 13,491 and 18,409.50 is: 25,121.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491 : 18,409.50 = 18,409.50 : x
  2. Step 2: Convert to fraction form
    13,491/18,409.50 = 18,409.50/x
  3. Step 3: Cross multiply
    13,491x = 18,409.50 × 18,409.50
  4. Step 4: Simplify right side
    13,491x = 338,909,690.25
  5. Step 5: Solve for x
    x = 338,909,690.25/13,491
  6. Step 6: Final answer
    x = 25,121.17

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.