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Finding the Third Proportional to 4,928 and 7,887

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Solution

The third proportional to 4,928 and 7,887 is: 12,622.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,928 : 7,887 = 7,887 : x
  2. Step 2: Convert to fraction form
    4,928/7,887 = 7,887/x
  3. Step 3: Cross multiply
    4,928x = 7,887 × 7,887
  4. Step 4: Simplify right side
    4,928x = 62,204,769
  5. Step 5: Solve for x
    x = 62,204,769/4,928
  6. Step 6: Final answer
    x = 12,622.72

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.