The term "4x" typically refers to a fourfold increase or multiplication by four. In mathematics, it can represent a variable, where "x" is multiplied by 4, resulting in a new value. For example, if x equals 2, then 4x equals 8. This concept is commonly used in various fields, including finance, science, and engineering, to describe growth or scaling. In the context of investing, "4x" can also indicate a return on investment that is four times the original amount. For instance, if an investor puts in $1,000 and achieves a 4x return, they would receive $4,000 back. This metric is often used to evaluate the success of investments or business ventures.