To achieve the task with ssh and scp (instead of rsync): lets break the task into 2 steps:
1. Create directory if missing:
ssh user@ftpserver.com "mkdir -p /data/install/somefolder"
2. Copy to it:
scp -r /data/install/somefolder user@ftpserver.com:/data/install/somefolder
Put them together
server="user@ftpserver.com"
destiny="/data/install/somefolder"
src="/data/install/somefolder"
ssh "$server" "mkdir -p $destiny" && scp -r "$src" "$server:$destiny"