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Finding the Fourth Proportional to 11,908.15, 17,889.77 and 7,479.61

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Solution

The fourth proportional to 11,908.15, 17,889.77 and 7,479.61 is: 11,236.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,908.15 : 17,889.77 = 7,479.61 : x
  2. Step 2: Convert to fraction form
    11,908.15/17,889.77 = 7,479.61/x
  3. Step 3: Cross multiply
    11,908.15x = 17,889.77 × 7,479.61
  4. Step 4: Simplify right side
    11,908.15x = 133,808,502.59
  5. Step 5: Solve for x
    x = 133,808,502.59/11,908.15
  6. Step 6: Final answer
    x = 11,236.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.