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Finding the Third Proportional to 5,491 and 8,669

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Solution

The third proportional to 5,491 and 8,669 is: 13,686.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,491 : 8,669 = 8,669 : x
  2. Step 2: Convert to fraction form
    5,491/8,669 = 8,669/x
  3. Step 3: Cross multiply
    5,491x = 8,669 × 8,669
  4. Step 4: Simplify right side
    5,491x = 75,151,561
  5. Step 5: Solve for x
    x = 75,151,561/5,491
  6. Step 6: Final answer
    x = 13,686.32

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.