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Finding the Third Proportional to 5,675 and 9,120

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Solution

The third proportional to 5,675 and 9,120 is: 14,656.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,675 : 9,120 = 9,120 : x
  2. Step 2: Convert to fraction form
    5,675/9,120 = 9,120/x
  3. Step 3: Cross multiply
    5,675x = 9,120 × 9,120
  4. Step 4: Simplify right side
    5,675x = 83,174,400
  5. Step 5: Solve for x
    x = 83,174,400/5,675
  6. Step 6: Final answer
    x = 14,656.28

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.