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Finding the Third Proportional to 10,840 and 15,436

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Solution

The third proportional to 10,840 and 15,436 is: 21,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,840 : 15,436 = 15,436 : x
  2. Step 2: Convert to fraction form
    10,840/15,436 = 15,436/x
  3. Step 3: Cross multiply
    10,840x = 15,436 × 15,436
  4. Step 4: Simplify right side
    10,840x = 238,270,096
  5. Step 5: Solve for x
    x = 238,270,096/10,840
  6. Step 6: Final answer
    x = 21,980.64

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.