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Finding the Third Proportional to 6,890 and 7,484

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Solution

The third proportional to 6,890 and 7,484 is: 8,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,890 : 7,484 = 7,484 : x
  2. Step 2: Convert to fraction form
    6,890/7,484 = 7,484/x
  3. Step 3: Cross multiply
    6,890x = 7,484 × 7,484
  4. Step 4: Simplify right side
    6,890x = 56,010,256
  5. Step 5: Solve for x
    x = 56,010,256/6,890
  6. Step 6: Final answer
    x = 8,129.21

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.