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Finding the Third Proportional to 5,580 and 12,129

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Solution

The third proportional to 5,580 and 12,129 is: 26,364.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,580 : 12,129 = 12,129 : x
  2. Step 2: Convert to fraction form
    5,580/12,129 = 12,129/x
  3. Step 3: Cross multiply
    5,580x = 12,129 × 12,129
  4. Step 4: Simplify right side
    5,580x = 147,112,641
  5. Step 5: Solve for x
    x = 147,112,641/5,580
  6. Step 6: Final answer
    x = 26,364.27

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.