Big miners BHP Group BHP.AX and Rio Tinto RIO.AX added 2.6% and 2.5%, respectively. By Vasudha Kaukuntla May 4 (Reuters) - Australian shares closed higher on Tuesday as the central bank raised its economic growth forecast and kept interest rates on hold, with commodity-related stocks leading the way on the benchmark index. RBA Governor Philip Lowe appears willing to do "whatever it takes" to get unemployment closer to 4% and annual wage growth near 3% to see inflation sitting securely within the bank's 2%-3% target, they added.