A list of measurements in increasing order is 4, 5, 6, 8, 10 and x. If the median of these measurements is 3/4 times their arithmetic mean, what is the value of x?  Choose the correct choice from the following answers:
A) 17
B) 19
C) 21
D) 23
E) 25
The median is (6+8)/2= 
<gadget id="calculator">(6+8)/2</gadget>
<output>7</output>
7   The mean is (4+5+6+8+10+x)/6= (33+x)/6   (33+x) /6 * 3/4 = 7   x = 56-33= 
<gadget id="calculator">56-33</gadget>
<output>23</output>
23   The answer is 23.
<result>D</result>
A list of measurements in increasing order is 4, 5, 6, 8, 10 and x. If the median of these measurements is 3/4 times their arithmetic mean, what is the value of x?