Ruchika shot 175.5 in the eight-woman final, while China's Mengshue Xang won the gold with a score of 198.8 and her countrywoman Yuemei Lin bagged the silver shooting 194.3.
India, thus, concluded a successful campaign, finishing second overall with a rich haul of 15 medals, including six gold, five silver and four bronze.
China finished on top of the medal standings with a total of 32 medals including 14 gold, 10 silver and eight bronze.
The highlight of India's performance was Shahzar Rizvi's gold in the men's 10m air pistol which saw an India 1-2 in the event with the seasoned Jitu Rai winning silver.
Shahzar shot a phenomenal 199.9 in the final to Jitu's 197.5 to cap off a brilliant performance which also saw him partner Jitu and Om Prakash Mitharval for the team gold.
Among other notable Indian performances were Anmol's gold in the men's 10m air pistol youth event where he shot a 199 in the final to finish on top. The Indian 10m air pistol junior men's team comprising Saurabh Chaudhary, Hemendra Kushwah and Gurmeet also won the gold.