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Finding the Fourth Proportional to 8,509.66, 11,738.53 and 5,105.79

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Solution

The fourth proportional to 8,509.66, 11,738.53 and 5,105.79 is: 7,043.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,509.66 : 11,738.53 = 5,105.79 : x
  2. Step 2: Convert to fraction form
    8,509.66/11,738.53 = 5,105.79/x
  3. Step 3: Cross multiply
    8,509.66x = 11,738.53 × 5,105.79
  4. Step 4: Simplify right side
    8,509.66x = 59,934,456.82
  5. Step 5: Solve for x
    x = 59,934,456.82/8,509.66
  6. Step 6: Final answer
    x = 7,043.11

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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.