Get the Min number of a dataset based on multiple columns?

[HIGGS1989]

So I have the following data set: 

group	rnk	buckets	# loans
bucket	1	-0	345
bucket	1	-0	5467
bucket	1	12	453
bucket	1	12	22
bucket	1	12	125
bucket	2	14	2565
bucket	2	14	4232
bucket	2	14	213
bucket	2	17	123
bucket	2	17	12
bucket	2	17	45
bucket	2	17	567

I need to create a new column that looks for the Minimun value of those groups taking into consideration that there are multiple type of groups instead of buckets and the rankc column alongside with the buckets will change. So for example:

group	rnk	buckets	# loans	Min value
bucket	1	-0	345	345
bucket	1	-0	5467	345
bucket	1	12	453	22
bucket	1	12	22	22
bucket	1	12	125	22
bucket	2	14	2565	213
bucket	2	14	4232	213
bucket	2	14	213	213
bucket	2	17	123	12
bucket	2	17	12	12
bucket	2	17	45	12
bucket	2	17	567	12

As you can see a new column is added with the MIN value of the data as mentioned above. How can I do this using DAX?

[FreemanZ]

hi @HIGGS1989 

try like:

MinValue =

MINX(

    FILTER(

        TableName,

        TableName[group]=EARLIER(TableName[group])

&&TableName[rnk]=EARLIER(TableName[rnk])

&&TableName[buckets#]=EARLIER(TableName[buckets#])

    ),

    TableName[loans]

)