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Finding the Third Proportional to 6,690 and 10,309.50

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Solution

The third proportional to 6,690 and 10,309.50 is: 15,887.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,690 : 10,309.50 = 10,309.50 : x
  2. Step 2: Convert to fraction form
    6,690/10,309.50 = 10,309.50/x
  3. Step 3: Cross multiply
    6,690x = 10,309.50 × 10,309.50
  4. Step 4: Simplify right side
    6,690x = 106,285,790.25
  5. Step 5: Solve for x
    x = 106,285,790.25/6,690
  6. Step 6: Final answer
    x = 15,887.26

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.