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Finding the Third Proportional to 5,509 and 7,392

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Solution

The third proportional to 5,509 and 7,392 is: 9,918.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,509 : 7,392 = 7,392 : x
  2. Step 2: Convert to fraction form
    5,509/7,392 = 7,392/x
  3. Step 3: Cross multiply
    5,509x = 7,392 × 7,392
  4. Step 4: Simplify right side
    5,509x = 54,641,664
  5. Step 5: Solve for x
    x = 54,641,664/5,509
  6. Step 6: Final answer
    x = 9,918.62

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.