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Finding the Third Proportional to 6,931 and 16,778

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Solution

The third proportional to 6,931 and 16,778 is: 40,614.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,931 : 16,778 = 16,778 : x
  2. Step 2: Convert to fraction form
    6,931/16,778 = 16,778/x
  3. Step 3: Cross multiply
    6,931x = 16,778 × 16,778
  4. Step 4: Simplify right side
    6,931x = 281,501,284
  5. Step 5: Solve for x
    x = 281,501,284/6,931
  6. Step 6: Final answer
    x = 40,614.82

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Why These Related Problems?

These problems maintain the same ratio (2.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.