Hey dear, you need to mention what exam and for what course are you talking about. 4000 is a good rank if you have given jee exam. With this rank you can easily get NIT'S and IIIT'S easily. And if it is for neet than you can get a good bams or bhms college. So, no need to worry your rank is average and you can get a good college. For more information go through these links for college prediction and cutoffs for NIT'S and IIIT's:
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits