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Finding the Fourth Proportional to 8,313.67, 11,474.29 and 7,939.99

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Solution

The fourth proportional to 8,313.67, 11,474.29 and 7,939.99 is: 10,958.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,313.67 : 11,474.29 = 7,939.99 : x
  2. Step 2: Convert to fraction form
    8,313.67/11,474.29 = 7,939.99/x
  3. Step 3: Cross multiply
    8,313.67x = 11,474.29 × 7,939.99
  4. Step 4: Simplify right side
    8,313.67x = 91,105,772.12
  5. Step 5: Solve for x
    x = 91,105,772.12/8,313.67
  6. Step 6: Final answer
    x = 10,958.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.