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Finding the Third Proportional to 7,723.25 and 12,783

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Solution

The third proportional to 7,723.25 and 12,783 is: 21,157.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,723.25 : 12,783 = 12,783 : x
  2. Step 2: Convert to fraction form
    7,723.25/12,783 = 12,783/x
  3. Step 3: Cross multiply
    7,723.25x = 12,783 × 12,783
  4. Step 4: Simplify right side
    7,723.25x = 163,405,089
  5. Step 5: Solve for x
    x = 163,405,089/7,723.25
  6. Step 6: Final answer
    x = 21,157.56

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Why These Related Problems?

These problems maintain the same ratio (1.66) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.