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Finding the Third Proportional to 15,693.75 and 20,749.50

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Solution

The third proportional to 15,693.75 and 20,749.50 is: 27,433.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693.75 : 20,749.50 = 20,749.50 : x
  2. Step 2: Convert to fraction form
    15,693.75/20,749.50 = 20,749.50/x
  3. Step 3: Cross multiply
    15,693.75x = 20,749.50 × 20,749.50
  4. Step 4: Simplify right side
    15,693.75x = 430,541,750.25
  5. Step 5: Solve for x
    x = 430,541,750.25/15,693.75
  6. Step 6: Final answer
    x = 27,433.96

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.