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Finding the Third Proportional to 7,877.25 and 11,980.13

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Solution

The third proportional to 7,877.25 and 11,980.13 is: 18,219.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,877.25 : 11,980.13 = 11,980.13 : x
  2. Step 2: Convert to fraction form
    7,877.25/11,980.13 = 11,980.13/x
  3. Step 3: Cross multiply
    7,877.25x = 11,980.13 × 11,980.13
  4. Step 4: Simplify right side
    7,877.25x = 143,523,395.02
  5. Step 5: Solve for x
    x = 143,523,395.02/7,877.25
  6. Step 6: Final answer
    x = 18,219.99

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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.