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Finding the Fourth Proportional to 8,391.76, 11,579.67 and 6,712.56

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Solution

The fourth proportional to 8,391.76, 11,579.67 and 6,712.56 is: 9,262.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.76 : 11,579.67 = 6,712.56 : x
  2. Step 2: Convert to fraction form
    8,391.76/11,579.67 = 6,712.56/x
  3. Step 3: Cross multiply
    8,391.76x = 11,579.67 × 6,712.56
  4. Step 4: Simplify right side
    8,391.76x = 77,729,229.66
  5. Step 5: Solve for x
    x = 77,729,229.66/8,391.76
  6. Step 6: Final answer
    x = 9,262.57

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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.