Silvers, Golds. We need to have a talk about throwing.
Stop it. Just stop.
So your team is winning, got 2 inhibitors down, and all that needs to happen is a closing push. Do not be running it down mid solo, I see it happen way too often after those inhibs the one or two people who died will just run down mid and get caught by the respawned enemy team. Guess what happens then, the enemy forces a 4v5 baron fight, they win and then just end the game since its nearing 40 minutes. Have some sense of macro gameplay, wait for your carries to buy with that previous victory gold, just wait for everyone to get together. There is no reason for you to be alone past river to get those measly 6 creeps if it results in your death. That's the time to go ward baron, clear wards around baron, or just wait. Just waiting in instances like this would win you more games. I've been in so many easily winnable games just to have them thrown by someone who has no right to be wandering alone. Just take it simply as this, past 30 minutes, don't be a jackass and stray from the team. Don't try to pad your score, that's throwing.