In a data center utilizing modular servers, a company is planning to expand its infrastructure to accommodate a growing workload. They currently have a modular server configuration that includes 4 compute nodes, each with 32 GB of RAM and 8 CPU cores. The company anticipates that their workload will increase by 50% over the next year. To effectively manage this increase, they are considering adding additional compute nodes. If each new compute node is expected to have the same specifications as the existing nodes, how many additional compute nodes should the company add to ensure they can handle the increased workload without performance degradation?