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Finding the Third Proportional to 4,811 and 7,842

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Solution

The third proportional to 4,811 and 7,842 is: 12,782.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,811 : 7,842 = 7,842 : x
  2. Step 2: Convert to fraction form
    4,811/7,842 = 7,842/x
  3. Step 3: Cross multiply
    4,811x = 7,842 × 7,842
  4. Step 4: Simplify right side
    4,811x = 61,496,964
  5. Step 5: Solve for x
    x = 61,496,964/4,811
  6. Step 6: Final answer
    x = 12,782.57

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.