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Finding the Third Proportional to 6,915 and 10,389.75

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Solution

The third proportional to 6,915 and 10,389.75 is: 15,610.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915 : 10,389.75 = 10,389.75 : x
  2. Step 2: Convert to fraction form
    6,915/10,389.75 = 10,389.75/x
  3. Step 3: Cross multiply
    6,915x = 10,389.75 × 10,389.75
  4. Step 4: Simplify right side
    6,915x = 107,946,905.06
  5. Step 5: Solve for x
    x = 107,946,905.06/6,915
  6. Step 6: Final answer
    x = 15,610.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.