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Finding the Third Proportional to 5,409 and 8,353

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Solution

The third proportional to 5,409 and 8,353 is: 12,899.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,409 : 8,353 = 8,353 : x
  2. Step 2: Convert to fraction form
    5,409/8,353 = 8,353/x
  3. Step 3: Cross multiply
    5,409x = 8,353 × 8,353
  4. Step 4: Simplify right side
    5,409x = 69,772,609
  5. Step 5: Solve for x
    x = 69,772,609/5,409
  6. Step 6: Final answer
    x = 12,899.35

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.