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Finding the Third Proportional to 5,168 and 7,021

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Solution

The third proportional to 5,168 and 7,021 is: 9,538.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,168 : 7,021 = 7,021 : x
  2. Step 2: Convert to fraction form
    5,168/7,021 = 7,021/x
  3. Step 3: Cross multiply
    5,168x = 7,021 × 7,021
  4. Step 4: Simplify right side
    5,168x = 49,294,441
  5. Step 5: Solve for x
    x = 49,294,441/5,168
  6. Step 6: Final answer
    x = 9,538.40

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.