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Finding the Third Proportional to 13,438 and 15,910

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Solution

The third proportional to 13,438 and 15,910 is: 18,836.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438 : 15,910 = 15,910 : x
  2. Step 2: Convert to fraction form
    13,438/15,910 = 15,910/x
  3. Step 3: Cross multiply
    13,438x = 15,910 × 15,910
  4. Step 4: Simplify right side
    13,438x = 253,128,100
  5. Step 5: Solve for x
    x = 253,128,100/13,438
  6. Step 6: Final answer
    x = 18,836.74

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.