Question 185017
A Column Of Water 2.31 Feet High Exerts A Pressure Of One (1)Pound Per Square Inch. How Much Pressure Does A Column Of Water 27'9" Feet High Exert??? 
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Change 27' 9" to 27.75 ft
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Let x = pressure of a column of water 27.75 ft
:
You can use proportion
{{{2.31/27.75}}} = {{{1/x}}}
cross multiply
2.31x = 27.75(1)
x = 27.75/2.31
x = 12.01 psi which is what you would have gotten if you changed 9" to ft