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Finding the Third Proportional to 7,912 and 12,168

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Solution

The third proportional to 7,912 and 12,168 is: 18,713.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912 : 12,168 = 12,168 : x
  2. Step 2: Convert to fraction form
    7,912/12,168 = 12,168/x
  3. Step 3: Cross multiply
    7,912x = 12,168 × 12,168
  4. Step 4: Simplify right side
    7,912x = 148,060,224
  5. Step 5: Solve for x
    x = 148,060,224/7,912
  6. Step 6: Final answer
    x = 18,713.38

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.