According to common recipes, the ratio of fennel to meat is usually 1: 1 or 1:2. This means that 4 kg of fennel can be matched with 4 kg or 8 kg of meat.

However, it should be noted that the specific proportion depends on personal taste and dish type. Fennel can be mixed with different kinds of meat, such as pork, beef and chicken. People with different preferences will adopt different proportions.

In addition, we should also consider the cooking methods of dishes and the proportion of seasonings, which will affect the final taste. Therefore, it is best to refer to specific recipes or consult a professional chef to determine the ratio of fennel to meat.