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Finding the Third Proportional to 6,989.63 and 8,889.75

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Solution

The third proportional to 6,989.63 and 8,889.75 is: 11,306.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,989.63 : 8,889.75 = 8,889.75 : x
  2. Step 2: Convert to fraction form
    6,989.63/8,889.75 = 8,889.75/x
  3. Step 3: Cross multiply
    6,989.63x = 8,889.75 × 8,889.75
  4. Step 4: Simplify right side
    6,989.63x = 79,027,655.06
  5. Step 5: Solve for x
    x = 79,027,655.06/6,989.63
  6. Step 6: Final answer
    x = 11,306.42

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Why These Related Problems?

These problems maintain the same ratio (1.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.