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Finding the Third Proportional to 11,157 and 14,215.50

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Solution

The third proportional to 11,157 and 14,215.50 is: 18,112.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,157 : 14,215.50 = 14,215.50 : x
  2. Step 2: Convert to fraction form
    11,157/14,215.50 = 14,215.50/x
  3. Step 3: Cross multiply
    11,157x = 14,215.50 × 14,215.50
  4. Step 4: Simplify right side
    11,157x = 202,080,440.25
  5. Step 5: Solve for x
    x = 202,080,440.25/11,157
  6. Step 6: Final answer
    x = 18,112.44

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.