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Finding the Third Proportional to 4,936.50 and 7,842

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Solution

The third proportional to 4,936.50 and 7,842 is: 12,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,936.50 : 7,842 = 7,842 : x
  2. Step 2: Convert to fraction form
    4,936.50/7,842 = 7,842/x
  3. Step 3: Cross multiply
    4,936.50x = 7,842 × 7,842
  4. Step 4: Simplify right side
    4,936.50x = 61,496,964
  5. Step 5: Solve for x
    x = 61,496,964/4,936.50
  6. Step 6: Final answer
    x = 12,457.60

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.