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Finding the Fourth Proportional to 11,208, 15,467.52 and 6,240

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Solution

The fourth proportional to 11,208, 15,467.52 and 6,240 is: 8,611.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,208 : 15,467.52 = 6,240 : x
  2. Step 2: Convert to fraction form
    11,208/15,467.52 = 6,240/x
  3. Step 3: Cross multiply
    11,208x = 15,467.52 × 6,240
  4. Step 4: Simplify right side
    11,208x = 96,517,324.80
  5. Step 5: Solve for x
    x = 96,517,324.80/11,208
  6. Step 6: Final answer
    x = 8,611.47

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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.