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Finding the Third Proportional to 13,420 and 15,364

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Solution

The third proportional to 13,420 and 15,364 is: 17,589.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420 : 15,364 = 15,364 : x
  2. Step 2: Convert to fraction form
    13,420/15,364 = 15,364/x
  3. Step 3: Cross multiply
    13,420x = 15,364 × 15,364
  4. Step 4: Simplify right side
    13,420x = 236,052,496
  5. Step 5: Solve for x
    x = 236,052,496/13,420
  6. Step 6: Final answer
    x = 17,589.60

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.