The fourth proportional to 0.08, 0.12 and 6 is:
9
The correct answer is 9.
A fundamental property of proportion is that the product of the extremes is equal to the product of the means. For $a:b :: c:d$, this means $a \times d = b \times c$. This property was used when we cross-multiplied to solve for the fourth proportional $x$ in our problem ($0.08 \times x = 0.12 \times 6$). Understanding these concepts is key to solving problems involving ratios and proportions, which are fundamental in various mathematical applications.
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