As far as I know, you can't. It would be safer to have a new outlet installed closer to the dryer.
You have to go buy a new four prong chord, unscrew the base of the old chord, and switch them out.
It may be a 220 Dryer, and you will need a new outlet installed. There should be no extra wires when connecting the Power cord to the plug
A qualified electrician should make the change to a dryer connection. The best way to cheaply make the change is to change the power cord on the dryer to the three hole standard.
Change either the plug or the cord. The fourth prong is another ground. It would be easier to change the cord.
I would not recommend trying to use an extension cord for a dryer. the better option is to either buy a longer cord that is properly sized to deal with the extra distance or have an electrician come out and either move the outlet or custom make you a longer cord for your dryer.
How do the wires connect on a 3 prong electrical cord on the lde8414ace maytag dryer
At any DYI store.
My question is WHY did you replace a four prong dryer plug with a three prong! 220 volt Electric dryers require two hot legs, a neutral and a system ground wire. Sounds as though you shunted one of the hots or the neutral. You need to install a four prong plug of the same configuration and wire it exactly as the original.
call an electrician!!!
All three prong dryer cords should fit all three prong outlets. Dryer and stove plugs are different but as long as someone didn't use one in place of a dryer cord, there isn't a problem.
Under the new electrical code rules three prong dryer cord receptacles and therefore cords are not allowed to be installed. As you are finding out, stores are not carrying them in stock any more. You should consider an upgrade for safety sakes, to a four prong plug cord and change the wall receptacle to a four prong receptacle. There are instructions on how to do this your self on Answers.
Electrical work is dangerous and should only be performed by a qualified electrician