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Finding the Third Proportional to 4,842 and 8,629.50

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Solution

The third proportional to 4,842 and 8,629.50 is: 15,379.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,842 : 8,629.50 = 8,629.50 : x
  2. Step 2: Convert to fraction form
    4,842/8,629.50 = 8,629.50/x
  3. Step 3: Cross multiply
    4,842x = 8,629.50 × 8,629.50
  4. Step 4: Simplify right side
    4,842x = 74,468,270.25
  5. Step 5: Solve for x
    x = 74,468,270.25/4,842
  6. Step 6: Final answer
    x = 15,379.65

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.