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Finding the Third Proportional to 8,238 and 12,776

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Solution

The third proportional to 8,238 and 12,776 is: 19,813.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,238 : 12,776 = 12,776 : x
  2. Step 2: Convert to fraction form
    8,238/12,776 = 12,776/x
  3. Step 3: Cross multiply
    8,238x = 12,776 × 12,776
  4. Step 4: Simplify right side
    8,238x = 163,226,176
  5. Step 5: Solve for x
    x = 163,226,176/8,238
  6. Step 6: Final answer
    x = 19,813.81

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.