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Finding the Third Proportional to 9,129 and 11,938.50

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Solution

The third proportional to 9,129 and 11,938.50 is: 15,612.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,129 : 11,938.50 = 11,938.50 : x
  2. Step 2: Convert to fraction form
    9,129/11,938.50 = 11,938.50/x
  3. Step 3: Cross multiply
    9,129x = 11,938.50 × 11,938.50
  4. Step 4: Simplify right side
    9,129x = 142,527,782.25
  5. Step 5: Solve for x
    x = 142,527,782.25/9,129
  6. Step 6: Final answer
    x = 15,612.64

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.