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Finding the Third Proportional to 7,718 and 11,289

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Solution

The third proportional to 7,718 and 11,289 is: 16,512.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,718 : 11,289 = 11,289 : x
  2. Step 2: Convert to fraction form
    7,718/11,289 = 11,289/x
  3. Step 3: Cross multiply
    7,718x = 11,289 × 11,289
  4. Step 4: Simplify right side
    7,718x = 127,441,521
  5. Step 5: Solve for x
    x = 127,441,521/7,718
  6. Step 6: Final answer
    x = 16,512.25

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.