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Finding the Third Proportional to 20,688.75 and 31,029.75

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Solution

The third proportional to 20,688.75 and 31,029.75 is: 46,539.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.75 : 31,029.75 = 31,029.75 : x
  2. Step 2: Convert to fraction form
    20,688.75/31,029.75 = 31,029.75/x
  3. Step 3: Cross multiply
    20,688.75x = 31,029.75 × 31,029.75
  4. Step 4: Simplify right side
    20,688.75x = 962,845,385.06
  5. Step 5: Solve for x
    x = 962,845,385.06/20,688.75
  6. Step 6: Final answer
    x = 46,539.56

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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.