Route all trafic for specific ip over specific network interface

I have a linux server that needs to get some routing. I'm fairly new at this and i don't find any clear source on google.

The setup should be simple:
All traffic to a server on ip 192.168.72.20 should be sent over interface 3. All other interfaces don't matter at the moment.

Here you have the output for route -n

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.72.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.72.0    0.0.0.0         255.255.255.0   U     0      0        0 eth1
192.168.72.0    0.0.0.0         255.255.255.0   U     0      0        0 eth2
192.168.72.0    0.0.0.0         255.255.255.0   U     0      0        0 eth3
192.168.72.0    0.0.0.0         255.255.255.0   U     0      0        0 eth4
169.254.0.0     0.0.0.0         255.255.0.0     U     1002   0        0 eth0
0.0.0.0         192.168.72.12   0.0.0.0         UG    0      0        0 eth0

Solution 1:

Try:

ip route add 192.168.72.20/32 dev eth3