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Finding the Third Proportional to 20,143 and 31,365

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Solution

The third proportional to 20,143 and 31,365 is: 48,838.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143 : 31,365 = 31,365 : x
  2. Step 2: Convert to fraction form
    20,143/31,365 = 31,365/x
  3. Step 3: Cross multiply
    20,143x = 31,365 × 31,365
  4. Step 4: Simplify right side
    20,143x = 983,763,225
  5. Step 5: Solve for x
    x = 983,763,225/20,143
  6. Step 6: Final answer
    x = 48,838.96

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.