In Excel, I want to get the corresponding number for a given value in a set of numbers.

Given values are in disorder.

Example:

```
1 | 21
2 | 34
3 | 15
4 | 47
5 | 29
```

Here the minimum value is 15 & max is 47,

I want get the numbers corresponding for 15 & 47, that is 3 & 4.

Note: Column 2 values are not in any order..

What Excel formula should I be using?