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Finding the Third Proportional to 11,781.56 and 15,485.06

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Solution

The third proportional to 11,781.56 and 15,485.06 is: 20,352.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.56 : 15,485.06 = 15,485.06 : x
  2. Step 2: Convert to fraction form
    11,781.56/15,485.06 = 15,485.06/x
  3. Step 3: Cross multiply
    11,781.56x = 15,485.06 × 15,485.06
  4. Step 4: Simplify right side
    11,781.56x = 239,787,160.63
  5. Step 5: Solve for x
    x = 239,787,160.63/11,781.56
  6. Step 6: Final answer
    x = 20,352.75

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.