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Finding the Third Proportional to 20,400.75 and 31,208.06

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Solution

The third proportional to 20,400.75 and 31,208.06 is: 47,740.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.75 : 31,208.06 = 31,208.06 : x
  2. Step 2: Convert to fraction form
    20,400.75/31,208.06 = 31,208.06/x
  3. Step 3: Cross multiply
    20,400.75x = 31,208.06 × 31,208.06
  4. Step 4: Simplify right side
    20,400.75x = 973,943,165.00
  5. Step 5: Solve for x
    x = 973,943,165.00/20,400.75
  6. Step 6: Final answer
    x = 47,740.56

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.