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Finding the Third Proportional to 11,520 and 25,120

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Solution

The third proportional to 11,520 and 25,120 is: 54,775.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,520 : 25,120 = 25,120 : x
  2. Step 2: Convert to fraction form
    11,520/25,120 = 25,120/x
  3. Step 3: Cross multiply
    11,520x = 25,120 × 25,120
  4. Step 4: Simplify right side
    11,520x = 631,014,400
  5. Step 5: Solve for x
    x = 631,014,400/11,520
  6. Step 6: Final answer
    x = 54,775.56

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.