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Finding the Third Proportional to 20,761 and 31,357.50

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Solution

The third proportional to 20,761 and 31,357.50 is: 47,362.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761 : 31,357.50 = 31,357.50 : x
  2. Step 2: Convert to fraction form
    20,761/31,357.50 = 31,357.50/x
  3. Step 3: Cross multiply
    20,761x = 31,357.50 × 31,357.50
  4. Step 4: Simplify right side
    20,761x = 983,292,806.25
  5. Step 5: Solve for x
    x = 983,292,806.25/20,761
  6. Step 6: Final answer
    x = 47,362.50

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.