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Finding the Third Proportional to 7,781.25 and 11,851.88

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Solution

The third proportional to 7,781.25 and 11,851.88 is: 18,051.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.25 : 11,851.88 = 11,851.88 : x
  2. Step 2: Convert to fraction form
    7,781.25/11,851.88 = 11,851.88/x
  3. Step 3: Cross multiply
    7,781.25x = 11,851.88 × 11,851.88
  4. Step 4: Simplify right side
    7,781.25x = 140,466,941.02
  5. Step 5: Solve for x
    x = 140,466,941.02/7,781.25
  6. Step 6: Final answer
    x = 18,051.98

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.