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Finding the Third Proportional to 20,185 and 31,362.50

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Solution

The third proportional to 20,185 and 31,362.50 is: 48,729.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,185 : 31,362.50 = 31,362.50 : x
  2. Step 2: Convert to fraction form
    20,185/31,362.50 = 31,362.50/x
  3. Step 3: Cross multiply
    20,185x = 31,362.50 × 31,362.50
  4. Step 4: Simplify right side
    20,185x = 983,606,406.25
  5. Step 5: Solve for x
    x = 983,606,406.25/20,185
  6. Step 6: Final answer
    x = 48,729.57

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.