In Scene 4 of The Glass Menagerie, explain how Amanda's character is consistent or inconsistent with the previous scenes.

In my mind, Amanda's pragmatism is unique in this scene. 
It is one of the few times that she is shown to be extremely pragmatic about her, the
life she leads, and the people in it.  In this scene, she understands Tom is becoming
like his father, and possesses an underlying sense that she is part of the reason for
driving both men away.  She is direct in stating to Tom that once Laura's future is
settled, he will be free to do what she wants.  Her pragmatism is present in wanting to
have a sit- down discussion with Tom and sending Laura for an errand in order to do it. 
It is unique for Amanda to have been this direct, indicating that the fight in the
previous scene truly did have an impact on her and demonstrated that their relationship
is beyond repair.  Tom's departure with calling her an "ugly—babbling old—witch" might
have impacted her to understand that her son, like his father, has one foot out the
door.  Cutting this deal with Tom regarding Laura's future is one of the last strings
that can bind mother and son.  She demonstrates a unique penchant for pragmatism in the
scene not only for negotiating for his freedom, but for her daughter, in understanding
that Laura will not attract gentlemen callers.  In her daughter being different from
her, Amanda seems to be indicating that she needs Tom's help in this regard.  The reward
for his help would be his freedom.  This practical side of Amanda in her relationship
with her children is something that is unique and new in the development of her
character.