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Finding the Third Proportional to 7,926 and 12,320

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Solution

The third proportional to 7,926 and 12,320 is: 19,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,926 : 12,320 = 12,320 : x
  2. Step 2: Convert to fraction form
    7,926/12,320 = 12,320/x
  3. Step 3: Cross multiply
    7,926x = 12,320 × 12,320
  4. Step 4: Simplify right side
    7,926x = 151,782,400
  5. Step 5: Solve for x
    x = 151,782,400/7,926
  6. Step 6: Final answer
    x = 19,149.94

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.