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Finding the Third Proportional to 3,889.69 and 8,386.31

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Solution

The third proportional to 3,889.69 and 8,386.31 is: 18,081.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.69 : 8,386.31 = 8,386.31 : x
  2. Step 2: Convert to fraction form
    3,889.69/8,386.31 = 8,386.31/x
  3. Step 3: Cross multiply
    3,889.69x = 8,386.31 × 8,386.31
  4. Step 4: Simplify right side
    3,889.69x = 70,330,237.35
  5. Step 5: Solve for x
    x = 70,330,237.35/3,889.69
  6. Step 6: Final answer
    x = 18,081.21

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.