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Finding the Third Proportional to 4,957 and 7,970

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Solution

The third proportional to 4,957 and 7,970 is: 12,814.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,957 : 7,970 = 7,970 : x
  2. Step 2: Convert to fraction form
    4,957/7,970 = 7,970/x
  3. Step 3: Cross multiply
    4,957x = 7,970 × 7,970
  4. Step 4: Simplify right side
    4,957x = 63,520,900
  5. Step 5: Solve for x
    x = 63,520,900/4,957
  6. Step 6: Final answer
    x = 12,814.38

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.