Video Transcript
Gloria can type 75 words in three minutes. Determine how many words she can type in four minutes.
We can represent typing 75 words in three minutes as a ratio, where the words are our numerator and the minutes are our denominator. By setting this equal to π₯ over four, where π₯ is the number of words weβre trying to determine and four is the number of minutes, this is creating a proportion, where we will cross multiply and solve.
To cross multiply, you find the cross product. So we take 75 times four and three times π₯. Again 75 times four and three times π₯; they cross.
75 times four is 300 and three times π₯ is three π₯. Now in order to solve for π₯, we need to get rid of three. Therefore, we must divide both sides by three. Therefore, π₯ equals 100. So what does that mean? This means Gloria can type 100 words in four minutes.
