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Given 3 scores of 84, 84, 84, what should be score number 4 in order to attain an average score of 87?

Setup Average Equation:

Average  =  Sum of our 3 numbers + unknown score of x
  Total Numbers

87  =  84 + 84 + 84 + x
  4

Cross Multiply

84 + 84 + 84 + x = 87 x 4
x + 252 = 348

Subtract 252 from both sides of the equation to isolate x:

x + 252 - 252 = 348 - 252

x = 96


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What is the Answer?
x = 96
How does the Missing Average Calculator work?
Free Missing Average Calculator - Given a set of scores and an average, this calculates the next score necessary to attain that average
This calculator has 2 inputs.
What 1 formula is used for the Missing Average Calculator?
Average = (your Sum of all numbers + unknown score of x)/Total Numbers
What 3 concepts are covered in the Missing Average Calculator?
average
A number expressing the central value of a set
Sum of Values/n
missing average
A score or rank required to reach a certain average
number
an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
Example calculations for the Missing Average Calculator
Missing Average Calculator Video

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