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Finding the Third Proportional to 4,020 and 7,092

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Solution

The third proportional to 4,020 and 7,092 is: 12,511.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,020 : 7,092 = 7,092 : x
  2. Step 2: Convert to fraction form
    4,020/7,092 = 7,092/x
  3. Step 3: Cross multiply
    4,020x = 7,092 × 7,092
  4. Step 4: Simplify right side
    4,020x = 50,296,464
  5. Step 5: Solve for x
    x = 50,296,464/4,020
  6. Step 6: Final answer
    x = 12,511.56

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.