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Finding the Third Proportional to 5,559 and 7,818.75

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Solution

The third proportional to 5,559 and 7,818.75 is: 10,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,559 : 7,818.75 = 7,818.75 : x
  2. Step 2: Convert to fraction form
    5,559/7,818.75 = 7,818.75/x
  3. Step 3: Cross multiply
    5,559x = 7,818.75 × 7,818.75
  4. Step 4: Simplify right side
    5,559x = 61,132,851.56
  5. Step 5: Solve for x
    x = 61,132,851.56/5,559
  6. Step 6: Final answer
    x = 10,997.10

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.