Help required for correlation of three dependent variables

I am currently doing my Physiotherapy Masters dissertation.

I am trying work out if there is a correlation between three dependent variables from the same sample (two ordinal data sets and one interval/ratio data set). I have already completed the correlations between each pair of data, but now want to look at the three together.

I have been unable to find an appropriate statistical tool on SPSS to do this.

Would anyone be able to help?

Many thanks,