Answer:
2221
Explanation:
1st Digit
To find the scale factor, divide one side of the larger shape by the corresponding side of the smaller shape.
⇒ 16 ÷ 4 = 4
Answer = 4
Therefore, 1st digit = 2
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2nd Digit

Cross multiply:

Divide both sides by 10:

Answer = 6
Therefore, 2nd digit = 2
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3rd Digit

Cross multiply:

Divide both sides by 5:

Answer = 7.5
Therefore, 3rd digit = 2
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4th Digit
XY ~ OM
XZ ~ ON
YZ ~ MN
Answer = YZ
Therefore, 4th digit = 1