Vlookup an equation result

I cant find a solution around this

Description of the problem is on the first sheet in red font

I want to look up what is the closest value to cell C15 (Highlighted in Red) from sheet 2 column (J) TMP Blue and return the value from the same raw but from Column (I)
Every time I try it, it gives me the closest value to C14 from Column (I) instead of the value from the same RAW
For example if I have a value of 3 in C14, it would look up value 2.9 from column (J) and return 2.5 from column (I) instead of 20

Thanks

Please explain the issue in your post as well as in the workbook. Thanks.

try:

=VLOOKUP(C15, Sheet2!I2:J16, 2,1)

He's looking up the first column as column J but wants to return the value in column I whcih you cant do in a straight VLOOKUP.
For approximate value the data has to be sorted in ascending order it would seem.

You probably want some form of

INDEX(I2:I16,MATCH(...),1)

This works without sorting but may fail if there are duplicate values in column J or you have long/recurring decimals

=INDEX(Sheet2!I2:I16,MATCH(C15+MIN(Sheet2!J2:J16-C15),Sheet2!J2:J16,0),1)
Array formula, use Ctrl-Shift-Enter

Use this array formula:

=INDEX(Sheet2!$I$2:$I$16,MATCH(MIN(ABS(Sheet2!$J$2:$J$16-$C$15)),ABS(Sheet2!$J$2:$J$16-$C$15),0))

Array Formulae are a little different from ordinary formulae in that they MUST be confirmed in the FIRST CELL ONLY by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. After that, the array can be dragged down as normal, to cover the desired range.

You will know the array is active when you see curly brackets { } - or "curly braces" for those of you in the USA, or "flower brackets" for those of you in India - appear around the outside of your formula. If you do not use CTRL+SHIFT+ENTER you will (almost always) get an error message or an incorrect answer. Press F2 on that cell and try again.

Don't type the curly brackets yourself - it won't work...

You're welcome.

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